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

int main()
{
    int i,j;
    char a[100], b[100];
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}
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Hidden content!
#include<stdio.h>
#include<string.h>

int main(void)
{
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    int i;
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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
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}
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Hidden content!
#include *   **  **  *    
#include * **    ** 

int main() 
{ 
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** * * *  * ** * *   **        * 0; 
}
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prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
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prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
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prog.c: In function 'main':
prog.c:9:11: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     int n=strlen(a);
           ^~~~~~
prog.c:9:11: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:9:11: note: include '<string.h>' or provide a declaration of 'strlen'
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prog.c: In function 'main':
prog.c:8:5: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
     scanf("%s %s",a,b);
     ^~~~~
prog.c:8:5: warning: incompatible implicit declaration of built-in function 'scanf'
prog.c:8:5: note: include '<stdio.h>' or provide a declaration of 'scanf'
prog.c:15:13: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
             printf("%s is not a prefix of %s",a,b);
             ^~~~~~
prog.c:15:13: warning: incompatible implicit declaration of built-in function 'printf'
prog.c:15:13: note: include '<stdio.h>' or provide a declaration of 'printf'
prog.c:21:9: warning: incompatible implicit declaration of built-in function 'printf'
         printf("%s is a prefix of %s",a,b);
         ^~~~~~
prog.c:21:9: note: include '<stdio.h>' or provide a declaration of 'printf'
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Hidden content!
#include <stdio.h>
#include *******    
#include  * *  ********* 

int main()
{
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* ** *   **** *        **   ** 0;
}
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Hidden content!
#include ***  ***   *  
#include * ****       *** * *

int prefix(const char *pre, const char *str)
{

**  *  *    ** * * **  *****  * **  **  ***  
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}

int main()
{
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  **  *  ** **  **  ** ***  **  0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>

int perfix(char *a,char *b){
  *  * *** ****  *** **  *** *   c;
 *     *** *   * ******   * *  **** ***    * * 
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    }
}

int main(){
******* *    ***  * * ****  ***   * **  a[100],b[100];
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 *   *     **    ******  * ** ** 
 *  *  ** ** **** *   ***  *  *   ** *** * ** ** * *     *   *  * **   *    * is not a prefix of %s",a,b);
*   *    * ***   *  *   **   0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
   ** **   *  * ** *** * ** p[100],s[100],a[100]={};
*  ** * *  * * * * ****  ****  *    t;
   **   * **  ** **    * *  ***  ****** 
 ** *  ***** *** *****  ** * **  ** ** *** 
**   * *** *  ** *   ***  ** **** ** %s",p,s);
   ** **      **     *    * **  ** *
 **  *  * ****  *     *  ***   *
      * *** *  *   * *  *  *      *
*  * **     *    *** ******     *  * ******  * 
 * *  ** ***   ***    *    **  * *** ***   *
**  *   ************ *  *  *** ** ***  * *******       ******* ***** *** is a prefix of %s",p,s);
*** *  * *** * ***** **** * 
 *   ***  *  *       *   *    
  ******   * * ***  * *  *  * *** ** **  *     **** * ***   *  is not a prefix of %s",p,s);
*  * **     *  *  *  *   * 
 *     ****  ***   *  ** **  0;
}
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