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= ** *** **  **   

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

** ** **     *  ***
if (cnt == n){
*    * ** *  *  **  ***   **  * *  * * *   * **   * *** 1;
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 *    *  **  ***      ****  * 
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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;
  *   ** * * * *   *  * a[100],b[100];
     *    ** * ** *  ** **  * **   * **** %s",a,b);
   ** *  *   * *   **     **  ****      **     *
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*    *** ** ** *** *    * *  * **  *   *     ** *** 
 ****   * * ***  **   * ** *    ***** *     * *  **  **  *  *  ** *   * ***** * **** *
 *  * ** * * * **  **  * ***  *   *    ** *    ** **     ** ***   *** **     * *******  **   *** * *    ***** **    is not a prefix of %s",a,b);
*  *   **** *   **   ****** * * *   **             *** ***  ****** * ***   **      * *  * ** * **   **  * **  **   
   *   ** * *  ***  * ***** * * *  ** *** ** * **  ***    *    ******    * *      *
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    }
 *  * ** **** **** *  *** * ** 0;
}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
** *   ********     * *** ***  * n,count;
 **  ****    * * ***  * *  ** * * ** *   ****  ** 
*  *  * **          * * * ***** * *       %s",a,b);
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*    ***  *** *    * * * *    *****  ** ** ** * * * *** ***  * * is not a prefix of %s",a,b);
** * *   ** *    **  * *** 
 *  ***  ** ****      *  ***   **  0;
}
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];
   *** ** * *  ** *** *  *   * ***    ** *  **
    int l1,l2;
***  ** *** ** * *   *** *  *     ***   
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    }
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*  *  *   *** * * *    *  **** * * *** * **   ** * * i=0;
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**     ** **   ****     *** **** * *  ** *** *    *  *   *  ** *** ***  *   ** * *  ***** (a[i]!=b[i]){
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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);
               ^
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Hidden content!
#include<stdio.h>
* *** *       * 
int main(void)
{

   ***  ***   * * * *  *   *** ** pre[100];
 **  * ****** * ** *******   word[100];
*** ***   *   *      **  **  * **  *  **  %s",pre,word);
* **** *   * * * **   **  *   ** *  * ** *
 ****   * * * * ** ****  ** *  * *   * * ***

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

** * * * *   **  **  * *   
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;
  * ****** **   * *    ** **  ***  
 * *  * * *  ** * * ** *****   ** * *** * **  
  ** *  *     * *  * *        ** *   ***** **  **  
 * ***  *  *   ** * ** * **   *** 
    **  *  *    * **  *  *  ** *  * * ******     *  *** (n=0;n<strlen(pre);n++)
** *  *   ** * *   *** ***       **  *** * *** ** ** *  *
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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);
**  **  ***   * *  * **  *   * ** ***
** **  * *  ***   *   **  *  **
*   * *  **  **   *  *  **  **  ****** * * * ****    **
**  ******** ****** *  *  ***   * *** 
 *******  * *  * * **    * * ** ***** * * ** **        *    ***  is a prefix of %s",p,s);
    ***  **  *   * *      ***
 * ***  *** **   * * *   * ***** 
   ***    *******    ** *     * *   * ***** * **  ***   *   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++)
*   ***      ********  **  *    ***** **  *  *****     *** **
*   ** * **** *****  * *  * **** ** ****** **  ****  * *   *** *     **  *    *  != b[i])
*  ***    *****  ** * * * * ** * ***   *  ** *  * ** *** ** ****  ****   **  *       * ****    ***  *** **    * *  *  *
**  *  * *  * *  ** ** * *** *   **     ** *  *  ** *  * *   ** ****  * *** *   **  **  *  **      *   * ****  **** *     *   * *    *  **  *** is not a prefix of %s",a,b);
***** * * ***  *****  *      *   ***  **** *  **** ****  ** * **       ** * *  ** * * *   *  * *   *  *  *** ** *  *** ** ***    * 
**   *   ***  **** * * * ** *  *  * * ***   *  *   * **** *** *** **  * *   *  * *    *** ** ***  *****    * 
**** **   *  *  ** ** *  *  * * ** ** ** * **   *   ** * *  * ***  * *  ** ** *    *   *  ****   ****** * == 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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