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()
{
    *   * ** ***   **  *  *    n[999],str[999];
 *** ***    * ** *  **  *  * *  ***  **   * n);
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* **  **   *       *   **** ***   *****  *  * * * ** *   **  *
*    *   *   *** *      **  * *  * 0;
}
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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));
              ^
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Hidden content!
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int main()
{
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return 0;

 }


if (i==plen-1)
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    * ****** * * * **** ** * * 


}
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Hidden content!
#include<stdio.h>
#include<string.h>

int main() {
 ****  * *  ****    *   * *** p[1000],s[1000];
* ******* *   ** *** **  **  * i=0,re=0,len;

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

*    *   *** *   * ** **  * ** a[100],b[100],c[100];
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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)
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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
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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;
*****  *   ****   ** ****** ** = 0; i< strlen(prefix); ++i)
**** ** *      ** * *    * ***
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*  *  ****  **** **      ****  * **              ****** *  * *
**** *  ** *   * * ***** ** *     ***   * *****     * **  ****   **  **      ****** ** **** * * is not a prefix of %s", prefix, word);
*  *  **   * **  **  * * *   **  **  *  * ****     ** ** *** * *** * * ***  *   * ** *** 0;
* *** ***      * ***  * * * * ***** * * * *   * ****** *** 
*******  *  *     *** * *** *** 
* *  ****      ***  * *** ***   *  is a prefix of %s", prefix, word);
*        ** *  *   * * *   ** *  **   0;
}
answered
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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
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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.
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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
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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)
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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.
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Case 0: Wrong output
Case 1: Wrong output
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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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