rev.c

reverse ()  
{  
    char str[50], temp; // define the size of str[] array  
    int i, left, right, len;  
    printf (" \n Display a reverse string in the C: \n");  
    printf (" ----------------------- ");  
    printf (" \n Enter a string to reverse order: ");  
    scanf( "%s", &str);  
    len = strlen(str); // get the length of the string  
    left = 0; // set left index at 0  
    right = len - 1; // set right index len - 1  
    // use for loop to store the reverse string  
    for (i = left; i <right; i++)  
    {  
        temp = str[i];  
        str[i] = str[right];  
        str[right] = temp;  
        right--;  
    }  
    printf (" The reverse of the original string is: %s ",  str);  
   // getch();  
}