Kiểm tra tính đối xứng của chuỗi

/***************Check string is symmetry***********************/
#include "stdio.h"
#include "conio.h"
#include "string.h"bool isSymStr(const char *str);

void main()
{
char str1[] = "ngoton.it";
char str2[] = "RADAR";
printf("'%s' is symmetry: %s\n", str1, isSymStr(str1)? "TRUE" : "FALSE");
printf("'%s' is symmetry: %s\n", str2, isSymStr(str2)? "TRUE" : "FALSE");
getch();
}

/************************************************
Check whether string is symmetry or not?
- if symmetry, return true
- if not, return false
*************************************************/
bool isSymStr(const char *str)
{
int i, len = strlen(str);
bool re = true;
for (i = 0; i < len/2; i++)
{
if (str[i] != str[len-i-1])
{
re = false;
break;
}
}
return re;
}