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];
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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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}
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);
               ^
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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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];
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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);

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      * *    * *    * *    flag = 1;

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

*  ******  ** **  **  * *  * * == 0)
* * * **  * ** *****    ***** 
***  *     *** ** *    * *   *    ***   **** * ** ** *   * * *  is not a prefix of %s", a, b);
*  *    *  ***** ******* ** *****
* ******    * * * ***** ** **** 
   ***  * *   * *     **  ** ***
**** ** * *   ** **  * * * *  **     * **** ******   *   * * * * * is a prefix of %s", a, b);
*     **  ****** **  ***  *
* **  *     * ****   *   *** **  0;
}
answered by (-285 points)
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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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   ** * *** *   * * * *  ***   *          ****  **   **  * * ***    **     **   **** **    *    * *****     *
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 * ***  **    * ***** *  * *******  * *  * *   * ***    *   * ** *    *  ** *** *  *** *   * * * ** *       *  ***     *  * *  *  ****  **   **  
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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;
 *  ****     ** * * ** ** *   **   * 
   **   ***  *    * **     *** *  *    ** **
   **   ***  * ** * *** ** *   * * **   *    * * ***      *    * **** 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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