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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}

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

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 **  ** ** ***  *  *  *** ** len_a = strlen(a);

*** ****** *  *** * * *  *  *  ** i = 0;

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

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 * *        *** **   **
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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++)
  *  **  * * ***  * **** * *** * ***** * *   ** ******
  ********* * ** * *  ** *** * ***   *********** *  *  * ** *   **   *  *  **   *   *** * != 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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