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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}
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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));
              ^
commented by (4.3k points)
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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 1: Correct output
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Hidden content!
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int main()
{
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return 0;

 }


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}
answered by (-336 points)
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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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        *  ***  ***    ****  **   *   ******    ***  *  ***  *  is not a prefix of %s", p, s);
    }
}
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()
{

******  ** * * *  ** * * a[100],b[100],c[100];
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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
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Case 2: Correct output
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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
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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
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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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0 0
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
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];
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  ***  ****   *  ** * **** **** ** *     **  *  *   *

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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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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-----------
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