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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*    ** *** ****** 
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];
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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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* ***     ******  ***  * * ***
 ** **    ***   ** *     * * 0;
}
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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'
commented by (4.3k points)
0 0
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];
**** ***** ** ** * *** ***   *  **  %s",pre,word);
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* ** * *     ** **      *   *** *    **  ***   *   

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

 **  **  *  *     **** *  * 
printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 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)
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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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 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);
* *  *  **  ******** **    * * *  
  *  * * *   * *  * *** ** *  ** **    
*   *   * *  *  ***   ** ***  *** *  *  ** 
  *   * ** **   *****  ***   ** * **   
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* *  ***    **    *****   **** *
* * **  *****  * *  ******* *  * 
 * *******   *    **** * **  * * **    ***  **    *** * *    **  * ******* 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);
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  *   *  *** **  *     *    *   ****       * **  * **** ** * **   **** *    * **** * ** **  *  ** ** * * * *   **** * 
  * **   *   ** *******  *  *     * *   *   **  **  **  *    *   * **  ** ****  **  * == 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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