1-11 Exercise 3: Prefix of a string

Question

13.8k views

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 Jan 11, 2018 in Chapter 13: Strings by thopd (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited
edited Jan 11, 2018 by semicolon | 13.8k views

27 Answers

Page:

Diyiel · Answer 1 · 2018-01-13 00:58:32

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

char prefix(char s1[], char s2[])
 {
 int i;
 int length;
 int count=0;
 
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{
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}

answered Jan 13, 2018 by Diyiel (-193 points)

Stephen Richards · Answer 2 · 2018-01-13 00:46:20

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

int prefix (char st1[],char st2[]){
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}

int main(void) {
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}

answered Jan 13, 2018 by Stephen Richards (323 points)

ryan · Answer 3 · 2018-01-11 22:07:28

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

int main()
{
    int i,j;
    char a[100], b[100];
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}

answered Jan 11, 2018 by ryan (-301 points)

Headshake · Answer 4 · 2018-01-11 21:22:34

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

int main(void)
{
    char pre[100], str[100];
    int i;
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 * * *  **  * *  ** * * *** ** 0;
}

answered Jan 11, 2018 by Headshake (-281 points)
edited Jan 13, 2018 by Headshake

Sabrina Lin · Answer 5 · 2018-01-11 21:03:22

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

int main()
{
** ****** * **  ** ***      * a[100];

**    **  *  * **     *    * b[100];

****  ***  *  ****  *** *** i = 0;

* * ***    * ** ***  *  **    prefix = 1;

*  ** ***  *    *  * ** *  ** *      *  *  *  * a, b);

     ** ****  * *     ***   len = strlen(a);

*  * *  * ***** *  * ****  ** * = 0; i < len; i++)
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}

answered Jan 11, 2018 by Sabrina Lin (-285 points)
edited Jan 11, 2018 by Sabrina Lin

watty1998871108 · Answer 6 · 2018-01-11 21:00:46

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

int main() 
{ 
*** *  * ** * *    *  *     * a[100],b[100]; 
***  ** * ***  * *******   * i,j,prefix = 1; 
 *** ******  *   ****   **   *****    * *  %s",a,b); 
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** ****     ** * *    *   *  = 0 ; i < len ; i++) 
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*   *** *** * ******* * 0; 
}

answered Jan 11, 2018 by watty1998871108 (-127 points)
edited Jan 17, 2018 by watty1998871108

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'

commented Jan 17, 2018 by The Judge (4.3k points)

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'

commented Jan 17, 2018 by The Judge (4.3k points)

Sammi0208 · Answer 7 · 2018-01-11 21:00:08

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

int main()
{
  * *   *  *  **     **  *   a[100],b[100];
**    ** **  * ** **  *  ****  i,j,prefix = 1;
*   ***** **  *   ***** * *** *  *  * %s",a,b);
*    *         * **** **     len = strlen(a);
 *  * * *   *  * *  *  * *  = 0 ; i < len ; i++)
*   ***   *** * **  * * *** 
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*** * **   *     **** *   * *    * ** *** * *   ***  
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   **   * * * * *  *    ** ** * * * *  **** ***  * ** ** *** * * *   **   * * *   ****    *****   is not a prefix of %s",a,b);
* * *      * ** ** * * ***  *       *   ** ** ***  * **   *  **   **  *   *    * *      * 
 *   ** * *   ***** *       ***  * *   *** ***  *    

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    ****  * * *  * ****     * ** ** * *  *** * *   **        ***** *   is a prefix of %s",a,b);


 *  * **   **   **  * * ** ** 0;
}

answered Jan 11, 2018 by Sammi0208 (-255 points)
edited Jan 11, 2018 by Sammi0208

410530022 · Answer 8 · 2018-01-11 20:46:02

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

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

   * ***     * * * **  **     * *** *   ** 
*   * * * *  **  ** ******* ********  ****  * * * * *** *  0;
*  ** *  **    ****    *      * *   **  *  ***  ***
 **   * * * *****   ****** ** ***    *  ****  *****  * *** 1;
**** * ***  **  **** ***  return 0;


}

int main()
{
*** *** ** *   ** **   ** pre[100],str[100];
* ****** * ** ** **  *    
*   *  *** *     * **  ** **   ** **    **   ** * *
*  *    * **  *  * ** *** *  ** *** *    
 *** *** *** *     ** *   * *    *   ****  ** * ***  *  ** * is a prefix of %s",pre,str);
 **** ***** *   ** ** * 
**  ** * *  *  *    ** *  * **  *****  **    *  *****   *  * *  is not a prefix of %s",pre,str);
**       *  *** *** * ** ****  ** 0;
}

answered Jan 11, 2018 by 410530022 (-196 points)
edited Jan 11, 2018 by 410530022

LinJingYao · Answer 9 · 2018-01-11 20:28:50

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

int perfix(char *a,char *b){
  * *  * * *  *  *********  * c;
* * ** *    *    * *  ***     * *     * * *  ***   ** **
 ** ** *** *  ***         ****    *****  ** ** **   0;
 *  ** ***       *   *** * 
*  *** ** * ***    * *  *   *  ***
** **** *  *  * ****  * * * *    **  * * *** ** *  * *  *   **  ** **   *     ** of a string
   * **      * ** *     *   *   * *  ** ****   *****   ** *    ***   *** ** *    **   * * **     *
 ** *  * *    * *  ***  **** **** **   * * *  *    *  ** ****** **  * *   **  *  **   ****    *          ****    ** *  0;
* *   *** *  **  * **       *      *  *  ***       *
***   *****       **    *******  ***** *    * *    *  *****  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;
}

answered Jan 11, 2018 by LinJingYao (-498 points)
edited Jan 17, 2018 by LinJingYao

VincentXV · Answer 10 · 2018-01-11 20:05:37

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;
}

answered Jan 11, 2018 by VincentXV (54 points)

1-11 Exercise 3: Prefix of a string

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