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   **   *   * * 
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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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    }
*  *    * *    **       0;
}
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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);
               ^
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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 ()
{
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 **  ** *** ***** *   *   * * 0;
}
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Hidden content!
#include <stdio.h>
#include * ***** **** * * *
#include  **** ***   *** **

int main()
{
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**  **  *  * *    * **  ***** b[100];

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 *** * *** ** *     *      * *  len_a = strlen(a);

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********* **   ** *  * ****  *
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  ******** ** *   * **     
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  *********  *   *  *
** *** * *   **  **       **  *  ** 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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 *  ** * ** * ***  *** ** *  * **   ***    * *  **    
}
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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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  ** ***   * * ****** * ** *    *   **    ***  * ***     * ** * *  ** **  * 1;
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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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