1-11 Exercise 3: Prefix of a string

Question

10.7k 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 | 10.7k 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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}

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];

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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() 
{ 
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}

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()
{
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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)
{

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**  *  *    *** * * ***  **** * 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;
***    ***    * * ** **
*** * *   *** *  * *   *   *
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* *  * * * * *  **     **** ***     ** **  **    * **   
***  * * **  **   *  *** ***  **   **  ****    * *   ** 1;
    }
}

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