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;

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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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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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***  *  *  ****** * * ******         ** ***  * * ** ** **  *  * * * is a prefix of %s",a,b);


    }


}
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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*    *   *  **  * **      *  * **   **    **  * *  *** **  *  * *  **   * * *   ** * *

*** * ********** * *     *** 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)
 ***  ** *  *  ** ****  * *
 * *   * ******  * *******  ******  **  * **    *       **   ** 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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*  *  *** ***   **   *  * * 
   * *  * * ** *** *      * *    ***** ***     *   * * * 
* ** **  *** ** * * *  *  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];
  * **      ** *  * *** * ****** **    *  
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    for(i=0;i<strlen(a);i++)
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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;
* **  ** **** * ** *** ****  * ** 
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** *** *  **  * * *  ** * *    *  * ***** **** ** ***   **      *   * ***  * *      *  **  **
***  *** ***    * **  *     **** *** * * * * **  * ***** **
    * **  *    *  ***** ***** *  *
 ** *** ***     * *  * *  * ***  *   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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