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

int main(){
  *******     * ******* ** c;
****   * * * ** *  *  *** *  *  * a[100],b[100];
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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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    }
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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'
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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];
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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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  ** ***   * ** *** **   *   *  *** **   * *    *    *    ** *  * ** * ***** ****         *** 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++)
* *  **  * ** * ***  * *
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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);
**   *    ** * * *** * ** ** ** *   *
**  *  ****  ***    *  ***  * *  *   *
 **    ***      ***   *** **    *   *   *   ** * *** 
*  ** * ***** **  *** ****   *            
***  *  **   ********** *  ** * ****** * ****   ***** *  ****** **** ** 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++)
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 * ** *  * *** *   *   **   ** *   ** * **     ** ** *** *** * ** ** **  ****  ****   **    != 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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