1-11 Exercise 3: Prefix of a string

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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

 

[Exercise] Coding (C) - asked in Chapter 13: Strings by (12.1k points)
ID: 41439 - Available when: Unlimited - Due to: Unlimited
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Hidden content!
#include <stdio.h>
#include <string.h>

int main()
{
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*  *   *****   **    *  * *   *   0;
}
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prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
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prog.c: In function 'main':
prog.c:9:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]
     printf("%d",strlen(n));
              ^
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Hidden content!
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int main()
{
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return 0;

 }


if (i==plen-1)
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*  ** *   **  ***     * ** 


}
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Hidden content!
#include<stdio.h>
#include<string.h>

int main() {
    ***  ***  ** *** *  *** ***   * p[1000],s[1000];
**  * * *     *****    *  *** i=0,re=0,len;

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    }
}
answered by (-120 points)
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Case 0: Correct output
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Hidden content!
#include<stdio.h>
#include<string.h>
int main()
{

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    }
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* ***   *     ** **  * ******** **  **** *  ** 
    }
}
answered by (-329 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",&a,&b);
             ^
prog.c:8:15: 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)
0 0
prog.c: In function 'main':
prog.c:7:13: warning: format '%s' expects argument of type 'char *', but argument 2 has type 'char (*)[100]' [-Wformat=]
     scanf("%s%s",&a,&b);
             ^
prog.c:7:15: 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)
0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
0 0
-----------Re-judge-----------
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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Hidden content!
#include  ***** *   * *  
#include *  *  *  ** ***  
#include *  *  **   **   ***

int main()
{
** ***    **   ****  * **********  prefix[100];
**  * **  ** *  *  ****  *  *   * word[100];
*   *   * ****  **  * * ** ** **  *    %s", prefix, word);
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**     *  ***           **  ***  ** = 0; i< strlen(prefix); ++i)
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 *** * *** *  **  *     ** *****  ** ** ** *  **  *   *  * *****  *  ***     * **  **  0;
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 *  * **    ** * **  *  * * ** 
   *  ** ***       ***** ** ***  *** * *  is a prefix of %s", prefix, word);
 ******  **  **********  ******  0;
}
answered
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0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
commented by (4.3k points)
0 0
prog.c: In function 'main':
prog.c:15:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
prog.c:17:12: warning: zero-length gnu_printf format string [-Wformat-zero-length]
     printf("");
            ^~
commented by (4.3k points)
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Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
commented by (4.3k points)
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Hidden content!
#include  ** ***  *   ****
#include  * ** ***** *** **** 

int main(){
* *****  * **** ***   ** *  * * p[100],s[100];
  **** *** *** * *  *** ** * *    ******     *   * * *  * *
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*  *    *    ** ***    *  **    *******  **   
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 ** *   ********    ***  **  * 

**   *   *  * ***     ***     *  * ** *  **** **   is a prefix of %s",p,s);
*****  ** ***  **  **    **  ** *   **    ** ** is not a prefix of  * **  ** * ** 
  *  *  *    * * ** ***   *******   0;
}
answered by (-116 points)
0 0
prog.c: In function 'main':
prog.c:5:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(p);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:6:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(s);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
/tmp/cclwPOj6.o: In function `main':
prog.c:(.text+0x26): warning: the `gets' function is dangerous and should not be used.
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prog.c: In function 'main':
prog.c:8:19: warning: implicit declaration of function 'strlen' [-Wimplicit-function-declaration]
     for(int i=0;i<strlen(p);i++){
                   ^~~~~~
prog.c:8:19: warning: incompatible implicit declaration of built-in function 'strlen'
prog.c:8:19: note: include '<string.h>' or provide a declaration of 'strlen'
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Case 0: Correct output
Case 1: Correct output
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0 0
-----------Re-judge-----------
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Hidden content!
#include<stdio.h>
#include<string.h>

int main()
{
*       * ** ***  ** * * *    *** * i,count=0;
 **  *     * *  ** *    **** string1[100];
*  *****      ** ** * * * ** *  string2[100];
 **  * **    * *  *       * *   ***   ****** ***   * 
   *  * *  ***  *       ****  * ** *****  * * *  *

*  ** * * *****     * **  ***  **** * * *     ***  * *****
   *  **   ***    *   ***   
 *** *** *  *  ** *  ***     *** ** * ** *   *   *  * **** * ** *   *
  *  ***    *** ***     **  ** *    **** **** *** * * *  
***  *** **   * *   **** * ** ****   *   ***  **  ****  * ***  * ***  ** * *    *  *  ****
 ***  **  **** * **  **  *  ** *  *****    ***** * ** ***  *
    }
 ********  **** * * * **  * * * *
 * *     **   * * *    ** 
**   **  * **  **     ****** **    ** * ** **** *    *****   *    ***** is a prefix of %s",string1,string2);
 *        * *      *   **  
  * ***   *  **  **   ****** 
  * *****    *  ** ** *** **
  *       * *** **** ***** ***** * ** *****  * ** **   * *  *    **    is not a prefix of %s",string1,string2);
 *  **** ** *** *   **  ** *   
**   * ** *  * **     ** * *   ** *   0;
}
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prog.c: In function 'main':
prog.c:9:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string1);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
prog.c:10:5: warning: 'gets' is deprecated [-Wdeprecated-declarations]
     gets(string2);
     ^~~~
In file included from prog.c:1:0:
/usr/include/stdio.h:640:14: note: declared here
 extern char *gets (char *__s) __wur __attribute_deprecated__;
              ^~~~
/tmp/ccIBxtbQ.o: In function `main':
prog.c:(.text+0x2f): warning: the `gets' function is dangerous and should not be used.
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0 0
Case 0: Wrong output
Case 1: Wrong output
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0 0
Case 0: Correct output
Case 1: Correct output
Case 2: Correct output
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0 0
-----------Re-judge-----------
Case 0: Correct output
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