[C] trim 구현

#include <stdio.h>

#include <string.h>

#include <stdlib.h>

char* rtrim(char *str)

{

char * result;

int len = strlen(str);

int i = len;

int end=0;

result = (char *)calloc(len,sizeof(char));

strcpy(result, str);

while(i>0)

{

if( result[--i] == ' ' || result[i] == '\n' || result[i] == '\t' ) continue;

end = ++i;

break;

}

result[end] = '\0';

return result;

}

int main (void){

char temp[] = "test    \n    test2    \t \n";

char* result;

printf("[%s]\n", temp);

result = rtrim(temp);

printf("[%s]\n", result);

return 0;

}