1-11 Exercise 3: Prefix of a string

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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

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited
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Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
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}
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prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
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prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
commented by (4.3k points)
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Case 0: Correct output
Case 1: Correct output
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Hidden content!
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{
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return 0;

 }


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


}
answered by (-336 points)
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Case 0: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>

int main() {
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    }
}
answered by (-120 points)
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Case 0: Correct output
Case 1: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{

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    }
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    }
}
answered by (-329 points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:8:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:7:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:7:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
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Hidden content!
#include  *  **  * ** *  *
#include  *  *     * ******
#include ***** **  ****

int main()
{
** * ** *****  ** * **  * prefix[100];
  **    *    *  *  *     ** * ** word[100];
  **** **  ** **  *** ****  *** **   **     %s", prefix, word);
**** * ** * ** * **  ********  i;
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***     *  *** ** * **   ********  *   ** * *    * 
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*        *      *****  *   **** * *   * is a prefix of %s", prefix, word);
        ******** *** *      0;
}
answered
edited by
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
commented by (4.3k points)
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Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
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Hidden content!
#include   **  *   ** *  **
#include      **   *  **

int main(){
    **      **  *  *** *** * *    p[100],s[100];
** * ***  * * **** *    *    *** ****     ** **  * **   *** 
   ****    * ** ***  **** ** bf=1;
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 ******  *    *      *** * * **

  ** *  *  ** * *  * *  **          * * ** is a prefix of %s",p,s);
  * **   * *    *  *  *** *****  * *** *  ** * is not a prefix of   ** *** * *
* ** *   * **  ******** *   * * *  *  0;
}
answered by (-116 points)
0 0
prog.c: In function 'main':
prog.c:5:5: 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:6:5: 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__;
              ^~~~
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cclwPOj6.o: In function `main':
prog.c:(.text+0x26): warning: the `gets' function is dangerous and should not be used.
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
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0 0
Case 0: Correct output
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commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
  **** **  ** * * ** *  * *    * i,count=0;
** ** *  *  ****     * *  ***** string1[100];
** *   *****  ***   ** **  **  *  string2[100];
**        * ***  * **** ****** * **      **   *****
 *** *  *     ***   *   ** *    **** **** ***  ***  *** 

  ****** * *** *  *  * ***** **   ** ** *  *  *
* **** * *  *   *****    * 
 * * *   **   ** *** *    **  ** *  * ***   *   *** *  ***** **  **
   * ****   ***  **  ** * *  * *** * *  **     **   
*      ** * *  * **  ** **    **   *** *   *** *** **   *       *     ** *  ** *** **   **** 
****** ***   ** *   ** ** ****** ***  ** * *** *  **     
    }
** * *   *  * *  ** ***   *** *    
*  * *  *  **** * **    *****
 ** *    *   *     *     *  *    **  * * *  *  * * **  ***  *** *** is a prefix of %s",string1,string2);
* **    **    *   * *  *      
* ***  *   *  *** *      * * *
 ** * ** **** *  **  ***  *** 
* ******  ** * *     **  * **  **  * * * ** * *     * * * *     * * * is not a prefix of %s",string1,string2);
* * * ** ***  *   * ***
******* ***  * * *** *** * 0;
}
answered by (-323 points)
edited by
0 0
prog.c: In function 'main':
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string1);
     ^~~~
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:10:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string2);
     ^~~~
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/ccIBxtbQ.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
commented by (4.3k points)
0 0
Case 0: Wrong output
Case 1: Wrong output
Case 2: Wrong output
commented by (4.3k points)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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