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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    }
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
***   **  ** *   **** *  ***    n,count;
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**    **       * **  ****** *
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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()
{
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* *****   ***** * *****     **   *** *   *  *** * *
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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)
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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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 * ** *   * ** ** **   ** 
*  **    ****            * * * * *** *** *   ******     * *  **  * *   **  *

 *** *** * * *   * **   * * 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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     *  *      *  *** * ***
 ***** *****  *   ** *    * *
 **  *  ** ******** ** *    
   ** ** **  * *    **   ** * ******   ** ****  *   *  **   **  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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 *   * *****   ** * ****** 
 * *     *   * * ***** **   **   **  * * **    **** * *  ** **
 ** *  ********** * * ******  ** 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[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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 ***     *  **    * **  **   **    * *   ***  *** * **   * ****  **  *** **** **  ****
 * ***   **** ** ***** * **  * ******  *   * *   ** ***
*** * * ******* ***  ** * ****     
* **  **** ****  **    *** *  **  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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