Final Exam 2 (20%)

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A string p is a prefix of a string s if the leading characters of s are identical to p. For example, "abc" is a prefix of "abcde". Develop a function prefix that checks if a C string p is a prefix of another C string s.

p是s的前綴若s開頭的一段字串等於p。例如，"abc"是"abcde"的前綴。寫一個程式 判斷字串p是否字串s的前綴。

Example input 1:

abc
abcde

Example output 1:

abc is a prefix of abcde

 

Example input 2:

bc
abcde

Example output 2:

bc is not a prefix of abcde

 

[Exam] đã hỏi trong Final Exam
ID: 42299 - Xem được từ: 2018-01-17 14:00 - Hiệu lực đến: Không giới hạn
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Hidden content!
* ******  *  **** 
   **  **   ** *** *  *

int main()
{
    ** * ** char  ** * *   ***
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 ** **  *                ***    *   * c=0;
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**  *   *   **** * * * **   * * * * *   *  * ** else ** **   ** *****   *  * *** *
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**  *     * ****      ** }
** *     ** **  
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 *         ** *   * *     *    *   ***   is not a prefix of ***  *   **   * 
*  ** *    *     else
 *** **   ** * ** * ****  ******* ***     *   * *  is a prefix of * *** *   *
 *  *  *  ***  }
** *     *     return 0;
}
trả lời bởi (-258 điểm)
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0 0
prog.c: In function 'main':
prog.c:8:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
   scanf("%s",&a);
           ^
prog.c:9:11: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
   scanf("%s",&b);
           ^
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0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
đã bình luận bởi (4.3k điểm)
0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
đã bình luận bởi (4.3k điểm)
0 0
prog.c: In function 'main':
prog.c:10:6: warning: implicit declaration of function 'stlen' [-Wimplicit-function-declaration]
   if(stlen(b)>strlen(a))
      ^~~~~
/tmp/ccnE3ufV.o: In function `main':
prog.c:(.text+0x5b): undefined reference to `stlen'
collect2: error: ld returned 1 exit status
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Wrong output
Case 1: Correct output
Case 2: Wrong output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Correct output
Case 1: Wrong output
Case 2: Correct output
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0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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Hidden content!
  ***** ***  ******
        ** ***  * **   * 
int main()
{
   *****  ** *  * ap;
    *** ** ** *  * *  *     * * *  *** ** || ap=a)
* * ** ** *    ****** ** ****  ******* is a prefix of abcde\n");
**  *****  **   ** 
 **  *  ** * 
**  **  ***** * * *** ***     **    * * *   is not a prefix of abcde");
* ****** ****   *  ***  ** ***  *   *   ** **  *   ** * ***     **    ** ** 0;
 ****  **   * * **  ****  *** *  * **  *  ***     **  *** * *  ** *** *   *
  
trả lời bởi (-167 điểm)
0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input
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0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input
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0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input
đã bình luận bởi (4.3k điểm)
0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:10:12: warning: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^
prog.c:10:12: error: missing terminating " character
     printf("bc is not a prefix of abcde);
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prog.c:11:12: error: expected expression before 'return'
            return 0;
            ^~~~~~
prog.c:12:12: error: expected ';' before '}' token
            }
            ^
prog.c:12:12: error: expected declaration or statement at end of input
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0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:12:12: error: expected declaration or statement at end of input
            }
            ^
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0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:12:12: error: expected declaration or statement at end of input
            }
            ^
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0 0
prog.c: In function 'main':
prog.c:6:10: error: 'a' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
          ^
prog.c:6:10: note: each undeclared identifier is reported only once for each function it appears in
prog.c:6:17: error: 'z' undeclared (first use in this function)
   if(ap>=a&&ap<=z || ap=a)
                 ^
prog.c:12:12: error: expected declaration or statement at end of input
            }
            ^
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Hidden content!
      * ** * * * *
 * *  *  ***   * *    *

char p[1000],s[1000];
int i,pl,sl;

int test(char p[],char s[],int pl, int sl)
{
 *        **   *     **  *       ** i<pl; i++)
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****  ****   *  **  *** * ***    * **  * ***  **     *** (p[i]==s[i])
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 * *  * ** * *     *** *** **  * *   ** ******  * ** **   if(p[i]!=s[i])
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*** * * * *** * * * ********  **  **   *   ***** *** ****      * *   **     *   0;
***    ***** *******    **  **    *  ** * *  **   
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}


int main()
{
 **  ****  * *  
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**   ** ******* ",p);
 *  ** ** **       * *
 * *  ****  ****     *

sl=strlen(s);
pl=strlen(p);


* *  ***** ** * && pl<sl)
{

*  * **     *    *   **** **  *  *** * * is a prefix of %s",p,s);
}else
{
printf("%s is not a prefix of %s",p,s);
}





}
trả lời bởi (-336 điểm)
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Case 0: Correct output
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Case 2: Correct output
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Case 0: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
    **     **  ***  ** * a[99],b[99];
    int l,i;
*  *  ***  ***     *    **   *   *** *** *
**   * *     ** *  ***  *   *  *  
* **  *  *  *   *   ** * ***  *
   **  **** * *  ****** *  *  * * **    ***  *** 
    {
**  ****  * *  * ** *   * *  *  * *  ****     * ***    * *  
 *   *** ****  ***       * *** *******  * *    ***** 
 *    ** ** **    **  * * *  *  * **** *  * **  ** **** *   ** *  **   ***    ****  **  **** *    *  a prefix of %s",a,b);
* *   *** ***   *      **  ***   * * * *    *  * * *  *  *     ***   **  **** * ** **** *   *
 * *    **    *  ***** **    ****        **   * ** 
* *** * ** **  ****   * ** ***    **   **   * * * * **   
* * *  ****  **** *  * * *  **   ** * * *  *    * *   
 * * **** * *** * ** ** ****  *   **** * *** ****  ** *** **     **  ** ** * **     **  ****  not a prefix of %s",a,b);
*   *       *** *    *** **    ***  **  *  * **** ****   *  * *  * ****   *  * ** *****  
       *   ** *    *   * *  ** * *  **** * * * *** **
    }


}
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Case 0: Wrong output
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Hidden content!
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

int prefix(char a[100],char b[100]);


int prefix(char a[100],char b[100])
{
 * ** * ** *   **  **** ** i;
*** *    *  *   *  *  *   * ** count=0;
*  *   * * * ** *********      len;

   *   * ** *  ** *  **   *  * ****   

*  * *  **  ****** *   **  *** * **  *** 
** * ** *** **  *** ***  * 
*      **  *   * * *  *    * * * ***  *   *** *  * *******   ***
 * ** * * * *  * *   * *     ** **** *** *  *  
 ** **     *    *  * *   ****   ***  **  *** **  *     ** *   * * * *****  *    *****
* **** * **       **  ***** * * *    * * **    **** 
 * * * * **  **  * ** *** **** *  


* * **  * * **   * **     *  * **   *
****  **   * **  * ******* 
 ** ** * ***  ***     * * *       ****     ****    *    1;
** * *  * * **** **  * ** *
 **  *  * *    *  **  ** ** *    

   return 0;
}


int main()
{
**  **  *  **   **  **  *** a[100];
**** **  * * *  **** *     * b[100];


* * *     **  * * *  * * * * *  *** ***   *   **    *** *    
 ***** ***  *** ***  * *****  * **   *    **  * *   ****  * ***  

****    ** **   * **   *  ** *  ****  *** 
*** *  * * **  **   * ** * **  *  *  *  

 ****  **       ** **   * *****  *     

 {
**  ****   ***   * *** ** *    *******    * * ***   ***  *** *    is a prefix of %s",a,b);
   *  ** * *  * ****  **  * 
 ****   ***    ** ** **    **  ** 
 * *** * *  *   * ***   ** 
**   *  * * *  **  *** *** **  *    ***    ** * *  ** *****     ***  **  * is not a prefix of %s",a,b);
** **   **   * *  *** * *  * 


  *  *   **  *     ** ****    0;
}
trả lời bởi (-193 điểm)
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prog.c: In function 'main':
prog.c:45:15: warning: format '%[^
   ' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%[^\n]*c%",&a);
               ^
prog.c:45:20: warning: spurious trailing '%' in format [-Wformat=]
     scanf("%[^\n]*c%",&a);
                    ^
prog.c:46:15: warning: format '%[^
   ' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%[^\n]*c%",&b);
               ^
prog.c:46:20: warning: spurious trailing '%' in format [-Wformat=]
     scanf("%[^\n]*c%",&b);
                    ^
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0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
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Hidden content!
* * ** ** * ***** * ** * 
 * **   *  ****   *

int *
{
   ********    ****   **  *    **  *  **** ** no idea, I * *  even do it in the * * *** ****  
  *  **  * *****  ** * *  *  **  * 0;
}
trả lời bởi (-168 điểm)
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Hidden content!
#include  *    ** ***
#include  ** *   ***   
#include     **** * **   

int pref(char[],char[]);

int main(){

***   *** ** ** * *****  *    **  p[10],s[10];
   * * * ** **** *  * ** **** num;

 *  *  ** **  *** * * *  ** * 
* *  **  * *   ** ****** *   **
 ******  *****  * ******** **    ***   *  **  *  ***
       ****  * **  *  * ** * ******  *** *** *     * *** 

*  **** **** * ******     = pref(p,s);

 *  * **** **  **  * *  *    ** **  *
***    *  ***** * * * *  *   *** * ** **   **  ****** *   * *******      *  is a prefix of %s",p,s);
 *   *** *    * *****  **  * ** 
  *   * * * *        * ** * ** *  ***  **  * * *    ***  * *   * **   is not a prefix of %s",p,s);


 return 0;
}

int pref(char p[30],char s[30]){
* ** ***  * **   * ** * ** * * ** * i;

 **   *     ***       ** **  **  * *     **  * 
****** * * **** * ****   **    ** * **   *  *   *     *    * *  * *****  ** *    ** * *** ****
 *  **       **   *** **  *   * * ***  ** *  *** ***   *  ** **  **  **      * *   *   *    *  ** * **   is a prefix of %s",p,s);
* **    ***      *** * * *  **   **   *  **   ***** **  **  ** *
*****   ** ** ****  * * **    ** *   * * * *  *** ** *  * * ****  ***  **** * * **  *  ***  *  ***** ** is not a prefix of %s",p,s);

  * * *  *  * * ****** ** *  *

}
trả lời bởi (-74 điểm)
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prog.c: In function 'main':
prog.c:12:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:13:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/cc0tBG5r.o: In function `main':
prog.c:(.text+0x1f): warning: the `gets' function is dangerous and should not be used.
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prog.c: In function 'main':
prog.c:10:13: error: stray '#' in program
     int num;#include <stdio.h>
             ^
prog.c:10:14: error: 'include' undeclared (first use in this function)
     int num;#include <stdio.h>
              ^~~~~~~
prog.c:10:14: note: each undeclared identifier is reported only once for each function it appears in
prog.c:10:23: error: 'stdio' undeclared (first use in this function)
     int num;#include <stdio.h>
                       ^~~~~
prog.c:14:1: error: expected expression before 'int'
 int pref(char[],char[]);
 ^~~
prog.c: In function 'main':
prog.c:23:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&p);
             ^
prog.c:24:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&s);
             ^
prog.c: In function 'main':
prog.c:51:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:52:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
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prog.c: In function 'main':
prog.c:14:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&p);
             ^
prog.c:15:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[10]' [-Wformat=]
     scanf("%s",&s);
             ^
đã bình luận bởi (4.3k điểm)
0 thích 0 k thích 
Hidden content!
   ** * *  ***     
    * ** * ** *******   *

int main()
{
 ** *** *** length1, ***   * c;
  ****  * a[100];
 ** *** * b[100];
   **  ***  d[100];

 *****  ****  ** * ********  ** *  *    * 
 ***  * *  ** * *  ***** *** *  ** ** *

*** * *  ******** **

      * * **    *

* *   * ****  ***  * 
** *     *
*   *****  ******* ***** **** ** is a prefix of **   * *
 *   *
* ** *  * ** **  
 * * *  
*  ******  ** ** **  ** is not a prefix of **  **   * * 
* ** *

}
trả lời bởi (-66 điểm)
0 0
prog.c: In function 'main':
prog.c:11:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
  scanf("%s",&a);
          ^
prog.c:12:10: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
  scanf("%s",&b);
          ^
prog.c:24:11: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
  printf("%s is not a prefix of %s,a,b");
           ^
prog.c:24:33: warning: format '%s' expects a matching 'char *' argument [-Wformat=]
  printf("%s is not a prefix of %s,a,b");
                                 ^
đã bình luận bởi (4.3k điểm)
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Hidden content!
   ****    ** *****  
****    ** * *  * *** *

int main()
{
*  ** ****** *** ** * * *  *  * str;
***  * ** *** *    ****  ** * i, p, s;

 *  * *  * *** **** * *  **  ** *** * **  * **   &p, &s);

* *    * **  **** *    ** *   (i<=0; &p; i++);
***  * ** ** ** * *    * ** *   *
* **  *   **** *** *  ****    * ** **      *  * *   &p);
*  * * *   ** ****   *   ** ***   *   *    *
***  *  **  *  ****** ** 
 ** *   * ***  * * ***  

 ** * ** **  *    ** *  *     * *  ** 0;
}
trả lời bởi (-233 điểm)
0 0
prog.c: In function 'main':
prog.c:12:7: error: expected '(' before '{' token
     if{}
       ^
prog.c:13:12: warning: too many arguments for format [-Wformat-extra-args]
     printf("abc", &p);
            ^~~~~
prog.c:14:13: warning: format '%d' expects a matching 'int *' argument [-Wformat=]
     scanf("%d");
             ^
đã bình luận bởi (4.3k điểm)
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Hidden content!
**     ** * * ** *** * ***
     *   *  * *  *  * 
int main (){
char     ***   
char  * ** *
 ** *   * ***  *** *    *  *  * *  *
*   **    ** * * ** * * *  ** *    *
* ** ******  * *    *** *     **
*****  * ** *** * **  *  *** 
** **** *  * ****  
***** * * **   is a prefix of   * * **** * * * ***
}
else{
 *  ** * **  is not a prefix of %s  ***  ***  *    
}
*  *  0;
}
trả lời bởi (16 điểm)
0 0
prog.c: In function 'main':
prog.c:7:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
 scanf("%s",&string1);
         ^
prog.c:9:9: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
 scanf("%s",&string2);
         ^
đã bình luận bởi (4.3k điểm)
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