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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}

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{
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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()
{
* * ****  *** * **** * *  * *** n,count;
*       ** **  **  **  * * *      * *  * ** *** * 
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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)
{

*   * *  ** ** *   * ***   *  * pre[100];
  **  **    ** * **  ****   * * 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];
 ******* ***  **   ***   **  *  n ,i;
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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;

 **** *   *    * *** * *    *   **  ** = 0; i < len_a; i++)
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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]={};
**  ** *** **  *  * ** **** *   %s",p,s);
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**    * ** *    *** ** ** * 
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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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**  ** ** **    *** *  **  ***  * ** ** ** ** **   *** ***    *    ***  *   != b[i])
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 ****    * *  ** * ** ***** ***********    ****   ** * **  **   *      ** * ** ** * * ***  *  ********** *  **** *   * **
 ** ** ** *   *******   **  **   ** *   **   *    * * * *********  * ** ** ***   * ***    == b[strlen(a)-1])
  ***** * **  *  * *  *   ** ** *    *  *  ****   ***      *      * * * * ** *******   *  * **** *** **** 
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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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  * *  **  *   **   ****  ***** ****  ** ** * **** ******   *  *   * ** 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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