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   * * *  ** **  
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int prefix(char a[], char b[]){
int i, j,n;
int cnt=0;

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}
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Hidden content!
#include <stdio.h>
#include <string.h>

int main(){
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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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()
{
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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)
{

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*** *     * *   * ********* * 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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 ** * *  * *  *  ***** ** 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)
    ****   *    *       *  * *
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   ** * ** *    ** * * * *  
** *  **  *    *  ** ***  * * **
  **** * **** ***** *****  *
*  * *** **** ** *   * ** **   *   * * *   ****   ** * * * **   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;
}
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[strlen(a)-1])
******* * *        ** * **  * **  **     *   *** * ** **   ***** **  * *   **   ***   *****   *   ** * * ****
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   **  **  * *   *   ** ** ***   *** ******  **     **    *****  * ** *** ***  ** **  ******  ******** * ** * * *  * *  *** *** * **  **  *
* * * *     *  *     ***  ** * * *  *  **  * **** * *****   **  **    * * * * **  *  **** **** *   ** *** 
** ** * * *   *** ***   ** * *** ** *  *******  ** *  **
}
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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;
    **** *    *** *  *  * *  ****       *  *
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* * *  ** ***** * * *** *  *     ******* ****   * **  **** ** ** 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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