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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}
answered by (323 points)
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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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}
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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>
* ** * *  * ***  *
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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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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Hidden content!
#include <stdio.h>
#include ****     *** 
#include  ***** **** * **  *

int main()
{
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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];
  ** *   *   *** ***  **  * *   *** *   **     ***
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* ** *   **  * **** **  **    ***** ***   * **  *****
}
answered by (-301 points)
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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])
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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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