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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*  *   * ****  **  ****   
if (cnt == 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;
     **   * **** *  ******   a[100],b[100];
 *****       ***    *   ** ***   *    * * *  %s",a,b);
 *  *** *   ** ****     **   ***** * * ** ** 
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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];
 **  * **  *  **   * ***** ** *     **  *  * *  *
    int l1,l2;
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****    ** ** * *  **  ** * **   
*** *  * ***  ** *     * ***** * * * ******
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    }
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  ** *** ** **** **   **   ***     ****** *****  * *  *
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  * *  * *  **  **      ** ** ** *** ** * * ***** *  *****  * ** ** * *  is a prefix of %s",a,b);


    }


}
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];
  *** *    *  ** **   **      * ***** * *** %s",pre,word);
  **** *   *** ** ** **      *** * *  *
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*   * ****** ** * * * *  *    *    * * i;
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******   * *****  ***  **  ** *       *      *   *  * * * 
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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];
 **  *  * * *** *   *  ****    n ,i;
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 ******* *****        * **    * *  ** *** **** *
  *  ******** ***   *** * 
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*** **  *** *    *   **   * **** *  ** * ****   * *  **** * * *** *   * **   **  * * * * *   **** is a prefix of %s",pre,a);
 **  **** * * *   **    ** ************ * *** * ***    ** *  ***  **** ** *  ** * ** 
 * * *** **** *  *   * ** * *****   ** * * *  ***** ********   *** **    * *** *  *   * * *** * *   *** *     ****    is not a prefix of %s",pre,a);return 0;
* *  **   *      *  ***  * 
* *    **   **      ***  **  ** * *  ***    *   * * *****  *  **    ***** *** * ** 

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