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()
{
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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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}
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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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*  ****** ***   * * ***** *       **  *  ****   *** *    **    is not a prefix of %s",pre,str);
*** * **  * *** *****  **   *** ** 0;
}
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#include <stdio.h>
#include <string.h>

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

int main(){
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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;
 *** ** * ** ****    *  *****  ** ***     *  
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 **  ***  ***  * *  **  *   * ** ** **  %s",p,s);
* * ** *   **** * * ******   
**     *  *** *    *** **   *   *** 
   **    ** * *   * **  * ****   *   
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   *  * *  *******   *       **  * * *  ***
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**** *****  ** **   **** **  
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   ** **   * **   ** * *    ** ** ** ***    *** * * **    *  **   * is not a prefix of %s",p,s);
*  * ** * * ** *  **   ** 
  **  *   ** *    *** **  *   ** 0;
}
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