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[]){
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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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*  *    ******     ** ** **
**  *   ** ** *   ** **** *****   ** ***  ** *   **    *  * *** **** 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;
}
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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;
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* *  *     *     **   **  *  **  *   * **** *    *  0;
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 *  **  ** **** **  **  *** ***  *  ***  * * ** ***  * **  a[i]==b[i])
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** ** **    * **     *  * *  *          * *    ***  *   * * *    *    *** * 
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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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