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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}

int main()
{
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}
answered by (323 points)
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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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   * * *  * ****  ******** *  *******     *** ** ****  ***  **** 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)
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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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**   *****   **  *   ***** **** ** * * * 
* ** * *   * * **   *   *  ****  *  *  *** *

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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;

* **  *    * *    ** ***  **  *  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);
  *****  **     *    ** *** *
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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])
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 *   *   *  *** ** **  *   * **     **    * **   ** *** *    *** * ***  * ******* *  * ** *** *  *  ** *  ***** *** ** ******* ****  is not a prefix of %s",a,b);
*    * *    * *   *     **    *  *   *       ***    * ***   * *  * **  *  *   ****   ****** ***  *** ** ***   * ** *   * ******  **  *   **
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   ** * ***   *    *       *         *   **** **   *   **  *****  *  *** *** ***    * *   ***  ** *   *   *   
  * **  ** *  *   * *** *** *  *     ***  *****  *     **    ** *** ***  ***** *  ** * *  ***  ** *  ******   ****  * ***  **  ** **     ** *  **  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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