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

int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

n= ** *  * ** * 

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*  * *****   * ** * **        == b[i]){
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}

int main()
{
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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
*     ** ** ** *** * *** *  ** c;
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    }
*   ** * **     * * ***   ** *  *  0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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}
answered by (-284 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 %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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****** *  * ****** * *****    *  word[100];
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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)
0 0
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];

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

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

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 **  ** ** *** *   ** * * *     *  *  == 0)
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*  *** * *   ** ****** * ** * ****
* * *  * **  **  **  *  *    
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       *****  ** ** ******* *  **   * **    ** ** * * * *  * ***  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]={};
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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);
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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;
** **   * * *** *       ****** *   * 
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  *  ** **** ** *   *   **       *     *   *** * * *** **   *** ***   **  * *   ** 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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