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

int prefix (char st1[],char st2[]){
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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)
{
    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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* *** ***** *  **** ***  **     ** b[100];

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

int main() 
{ 
 **** **  *   **   **** * ** * a[100],b[100]; 
*  **   *   * ** *** *** *  i,j,prefix = 1; 
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****   * *  **  ***  ***  * len = strlen(a); 
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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()
{
****   **  ** ***  * * ** ** *  a[100],b[100];
*   **  * *   * **  *     i,j,prefix = 1;
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   ******* * ** * ** ****** **   ** * **** **    *** ** * *  *  ***  is a prefix of %s",a,b);


****** **      * ** ** ** ** **** 0;
}
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Hidden content!
#include  * *  ***   ** 
#include  *  *  *** *  *****

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

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


}

int main()
{
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       * ****  ***  * * 
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 *** *   ** ****** ****      ** ** *  **
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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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   **** **  ** ** ******     *        **  * * *  *
*     *  * * *   *  *    *  *  *   * *** *  * *   1;
    }
}

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