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

 

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Hidden content!
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#include  * *  * * ***  

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

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

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

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{
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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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Hidden content!
#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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** *     *   * * *  ****** **   **    *
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*****  ***  *    *   ***    *  * * * 
 ****    *  *** ***** * *      **  *  ** *   *  ***
*  * * *  * *******  * ****** ** * ****
 *    *** ****    ***    *   *   *** * *  ** *** * * *    **  * is a prefix of %s",p,s);
*** **** * *** *  *  *** ** *  *  
 * ** *  * ** **  *  * * * * * * *
 *   ** ***     * ***** * ** ****** **  *  ** ** ** *    * ** *   **   is not a prefix of %s",p,s);
***** **  *   * ***  *  * ***
 *    **   *   * *** *  * ****  0;
}
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