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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}
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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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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()
{
*** *    *  ***  * * * **  * * a[100];

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*    ** ** * *** **  *   *  *     * **  ***   ** *  *
 * * *   *** * ***  *    

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