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

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()
{
*  * ** * ** **     * * *  ** *   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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    }


}
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)
{

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***   **   **  *    *   *  **    word[100];
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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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  * ***  ** *   **  *  ** ** *  ** ** *** ***  *  ** * **   ** *    **  **  *** ** ** *

*  *  * *  * * *** *  *  ***   * 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;

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

  *            ****  **** ** **    == 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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**   **** * * **   **     * *
* **   *  ** *  ** ***     ** *********       * ** *  
 * * *   ** * *  * * *  *** * ** 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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**  ****  * ***    ***     * * * *  *   *    ** **  *   *** * * **     *    *   **  * ***  * **  ** * *    ***
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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;
 *    ***  * ** *   *  **   ** * *  * *  
**** **    *  ***   * * * * * ***  *  **  *  **  *
****  **  *  **  *    *    **  *  * * *  * **  * ** ****  * * *    *   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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