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;

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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()
{
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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()
{
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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);
               ^
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Hidden content!
#include<stdio.h>
 ** *** * * * ** ** 
int main(void)
{

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    * * * *  * * *  * **  * *** 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];
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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);

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**   * * * **  *  **   **  * * flag = 1;

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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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  *      *  **   ****   ***
 *** *  *   * ****   * *   * * *** *  **   * ****     ***** 
 *** * *  *** *   ***  *** ***  * *  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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***    ** *     **  * *  ****  **   ******   ***  *** *  **** **   *   * * 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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