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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37 Answers

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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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}

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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}
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];
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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);
               ^
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Hidden content!
#include<stdio.h>
 * *****   ** ** *   
int main(void)
{

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

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

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 **    ** * * *** * * ****      * *   * *  * * *  *** *  **     ** * * ** * 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]={};
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 * **   **  ** ****  ***  ***  * **  **  **   * ** * * **
*  *   *  ***  *  ** ** ***  *  *** 0;
}
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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])
******** * * ***    * * **   *  **  *** * ***   * *   * *  **  ****  *  ** *   **      ***    * ***
 * * *** *** *  ****** **   *  ***  ** **  * * *   ** ** **** *  **  * **   **** * ****  *    ********* ***    ** *   ******  *  * *  ***  *  * 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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