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;
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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)
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];
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printf("%s is a prefix of %s",pre,word);
return 0;
}
answered by (-249 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)
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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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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  ** *   *  ** * **     
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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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** **  **  ***  ***** ** *  ***   *****
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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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