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 * * *     ** *****
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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;
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}
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Hidden content!
#include <stdio.h>
#include <string.h>
int main()
{
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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()
{
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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>
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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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}
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Hidden content!
#include <stdio.h>
#include **      ** *** ****
#include *** *  * * ***

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

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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];
*   *****    *  ** *  ***       ** **   *   
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    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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* *** *     ** *   **  ** **    *** ** *  ****  **     
**  ** * *  *   *** *   *** *   ***** **** *  *** ***  *  ** *  ** * ** ** ****** 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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