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()
{
* * * *     * *  * * ** ***   n[999],str[999];
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}
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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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Case 0: Correct output
Case 1: Correct output
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Hidden content!
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{
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 }


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

int main() {
** *** *****  *  * **  * ** *   p[1000],s[1000];
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    }
}
answered by (-120 points)
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Case 0: Correct output
Case 1: Correct output
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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: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)
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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
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0 0
-----------Re-judge-----------
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 **   **     * **
#include *      ***     ** 

int main()
{
  ****  **********  ***   prefix[100];
  * *   * * ** * *   *** *** *  word[100];
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*      *** *  *  ****** ***  i;
**  ** ****      *  ** *** **  = 0; i< strlen(prefix); ++i)
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 ***  *     *** * ***  * **   ** *** *  *****     * *  ** *   **   ** **  * * ***  **** *    *** is not a prefix of %s", prefix, word);
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*     * ****   *** ** * * **  ** ** **  ** *  **    * **
*   **  ****   * * ** *   
 **   *** ** ** *  * *   *     * ******** **     is a prefix of %s", prefix, word);
 * * * **  ****      ***  **   * 0;
}
answered
edited by
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
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Hidden content!
#include  **  **  ** * *****
#include **  ******     

int main(){
      *****  *  *  **   * **     p[100],s[100];
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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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0 0
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Hidden content!
#include<stdio.h>
#include<string.h>

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

*  *  ****   *** **** *****  ***  *****  **   * 
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 ***** ***  *   * **  ** *  * ** **** * * *  ***  * *  *** *  *  **  **** 
 * * *  ***** ***  ** *   * ****** **** ** *** **   * *  * *
   ** * *   ***  * **** * **  ***** **  **  * **   ** **  *  * * * ***    * ***** ****  
 * *  *      *  *  **   ***  **   **        *   *****   *
    }
** *  *** *  **   ****   * *   
***  * *   * ** * * **   *  * 
  ** ******* * * ***   ***  ***   ** **   *   *  ***    * ** *   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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Case 1: Wrong output
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Case 0: Correct output
Case 1: Correct output
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-----------Re-judge-----------
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