1-11 Exercise 3: Prefix of a string

Question

11.1k 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 | 11.1k views

27 Answers

Page:

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

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

char prefix(char s1[], char s2[])
 {
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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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}

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];

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******* ***  ******  **  *  *  ***  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; 
}

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++)
 * * ** *  *     ***    * *
 **  *   *  ****   *  *  **   *   *    *   * *  ****  * *** != b[i])
** ****  ** *  *    *    * ** ***   ***  **** *  * * *  *  **
 *   **      * * *  *    *****  * * ** *   **  *  * **   ***  * *  ***  * *    ***     * = 0;
   * ** *  **   **** *  **    *** **  * * * ** *** ** *  *  * *       *** ** *** **  *    * ** is not a prefix of %s",a,b);
 * * * *      *** * **  ***   * *   * *****  ***    ***** *   *   * **   *   *  ****** *** *** 
 * * ** **  *     *  ** **  ****  * *   **     *** **

        *     *  * **** * *
* ** *    *  *** ****** ****** *   == 1)
*  *     * ** *  *  * *   *  *** * ****** * ** ***  ****   *   ** **** 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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