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];
* * ****  ** * * ***  *  ***     *   **    %s",a,b);
****  ****      *   * *  **** * * *** * *    * 
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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;
}
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()
{
*** ** * *** *******  * * * **   * a[100],b[100];
   ** *  ******    *   ***  *   ******* * *  * * *  
    int l1,l2;
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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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*      * *  ***  * ** ***** ** * ********  **  **

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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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 *****   **    * * *    **** * ****   ** ***  ** *  * ****  ** ***** ***   *  * *     * *    * * is a prefix of %s",pre,a);
 *** * **  *  ** *    *  *****  ** **      ** *  * * *  ** *  ** ** * *****      *  * *
    *     **     ** * **  * *   * ***   *** *** * *  *    ***             ** * * * * *** *   **  **  * ****   ****  * * **  ****** 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++)
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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);
 **   *     *  ** * ** ***   ****
  * * *** * ** * ** ****** * * * *****
  ****    **** *  *  ****   *** * ** * *   * ***   *
*  **  ** * *  **   *****   * ** *  *   
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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++)
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** * *****  * *** * ****  * *** * *******      *** **  *  *  * *** ***** *****  * **** != b[i])
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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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