Final Exam 2 (20%)

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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

 

[Exam] asked in Final Exam
ID: 42299 - Available when: 2018-01-17 14:00 - Due to: Unlimited
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37 Answers

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Hidden content!
#include * * *  **  * ***
#include ** *    *  *
    **  * **** *   
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int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

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}

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

int main(){
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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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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
             ^
prog.c:8:16: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s %s",&prefix,&word);
                ^
prog.c:10:15: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(i=0;i<strlen(prefix);++i)
               ^~~~~~
prog.c:10:15: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:10:15: note: include '<string.h>' or provide a declaration of 'strlen'
prog.c:18:6: error: expected '(' before 'printf'
      printf("%s is a prefix of %s",prefix,word);
      ^~~~~~
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{
*   ** * ** ** **  *  *  ***** a[100],b[100];
*    ***    *   ***  * * ** * *   ** * * *    * * *
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    }


}
answered by (-329 points)
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prog.c: In function 'main':
prog.c:5:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:5:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
prog.c:7:8: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     l1=strlen(a);
        ^~~~~~
prog.c:7:8: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:7:8: note: include '<string.h>' or provide a declaration of 'strlen'
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:6:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:6:15: warning: format '%s' expects argument of type 'char *', but argument 3 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
               ^
commented by (4.3k points)
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Hidden content!
#include<stdio.h>
     *  * * ****   
int main(void)
{

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printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
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prog.c: In function 'main':
prog.c:8:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&pre);
             ^
prog.c:9:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s",&word);
             ^
commented by (4.3k points)
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Hidden content!
#include <stdio.h>
#include <string.h>
#include <ctype.h>
int main ()
{
   *** ** * * ***** * * **  pre [100],a[100];
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 ** **   **     *  *****    *  * * 0;
}
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Hidden content!
#include <stdio.h>
#include ***    * ****
#include   *  *** **  * *   *

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

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

* *     * *    *   ***   **  * *  *** * ** * %s", a, b);

**** *** *  *  *   * *      len_a = strlen(a);

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

*** * * * * ** *******    flag = 1;

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

* **** ** *** *  * ***  ***  *  * == 0)
 ****** *  * *  ** *  * * * * *
  ****   * * ** **   *** ******  ** **  * *** *  **  * **** ****   is not a prefix of %s", a, b);
* ***  *******  * *** ** ** 
*   ** ****    *** * ******   
**  *    *** * *  **   * ****
  *   ****  *****    *** * *  **    *   *   ********* ***  ***        is a prefix of %s", a, b);
      **    * ******* *     *
*    *  *** **  **   *  **  *   * 0;
}
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Hidden content!
#include<stdio.h>
**   * * *     ****
int main()
{
 * *  * ** *** ***  * * ***   * i,n;
******** ****    **   * *  *   p[100],s[100],a[100]={};
  *****   ****   *  ***   ** *  **  * %s",p,s);
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    *  ********   * ***  *   **    *
 *  * * *** *  * ****   **   ***  * **    *   **  *** ** * 
*   * *** ** * *   * **   *   *  ** 0;
}
answered by (54 points)
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
    int i;
    char a[100];
    char b[100];
*   **  * **    **  **  *    * *   ** ***  *    *   **
    scanf("%s",b);
    for(i=0;i<strlen(a);i++)
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  *** **** * **   **  * **        *** ***  *      * ** **  ******* * ** ***     * * *  **** *** ***** ***   
 *  * ** ** *  **  **     * ***   **  * *       **** * 
}
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Hidden content!
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#define n 100

int aa(char a[],char b[]){
     * * ***  * *  **    **  *** * i;
* * *   * *   **** ******* **    ** *   * (a[0]!=b[0]){
  **  ** *    * ** ** * *    * *** * ****** *     *  *   *  *   *  0;
* *    ** **** ***  ** * * ** *    
 ***  * *** * *** * ** *  **** * * **  ** *    *
 *  ** * ****  ** ****** * *   *  *   *  *   ** * ** * *** *  **   a[i]==b[i])
** * * * ** * *    ** *****  * ** *  * *** *  * *   **
* *** ** * * *   * ***     ***  ** * * *****    * *    *** ***   * *  ***   * *    ****  * * * 1;
***  * *  * **  * **  **  *   ** ****    ***  *** *  **   ***            *   * **** 
  *   ***   * * ***** **   **  *  *  ***  * ** **
**   ***  ** *  *  * ** ***** *** 
  *   * ** **  *  *      **  *   *** * 0;

}

int main(){
  **** *    *   ** * **   ***   c[n],d[n],e[n];
**  * **     *****  * **  *   * i;
**   * ******* ** * ******    **  ** *** *  * %s",c,d);

***** *      **  * *      * ** ** *   **
**    * ****** **    *  **      * ***  ***** ****  *  *  * ** is a prefix of %s",c,d);

 *  *  *  * ** ** ***  *****
           *  * *  ** **  ** *  * *  *  * *** ** ******  *  *** ****  is not a prefix of %s",c,d);


}
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