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!
#include * ***  *  *  
#include * * *** **  

char prefix(char s1[], char s2[])
 {
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}
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Hidden content!
#include   **            *
#include  *    *     *  

int prefix (char st1[],char st2[]){
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*** **   *    ***  * **    *  0;
}
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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)
{
    char pre[100], str[100];
    int i;
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****   * ** **   ** * 0;
}
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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() 
{ 
    *     * *     *   * * **     a[100],b[100]; 
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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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0 0
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()
{
*******   * **  *** ** * * * a[100],b[100];
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   ****  **  *****   *  * ** ** ** len = strlen(a);
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 ** * * *  ** **  * * **      ******  *    ** *   **     **   *  ***  *** * * **  * 
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*    **** *   * ***  ***   *  ** 0;
}
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Hidden content!
#include  ********  *   **  
#include ***    * ** **

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

** *** **** *  * ******** **   * *** * *  * ***
  *  **  * * * ***  * **     * *    ***     **   **  **** 0;
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** * *** *  ****   *  ** * ** return 0;


}

int main()
{
* ** *** *** * *  **  * **   pre[100],str[100];
*  **** *  *   ****   
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    *    ** * **  * ** *****  **** *** ***
 *** **** * ** *   *  * ***   *    *  *****  *******   **    **   is a prefix of %s",pre,str);
** ** *  *  * ***       ***  * 
  * *  ***  ** *** *  *    **  * * **   *   ** ***      * * * *  * * 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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  *   **   *  *  *   *  ** * 
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***  *** **   * * **    * *     ** ** **   * *   ***     1;
    }
}

int main(){
 ** * ***  ** **   **  *   * * a[100],b[100];
  ** * ** **** ** ** **  *  *   %s",a,b);
  *** * ***  *   *  * **** **   *  *
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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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