String reverse order

Enter a string , Reverse the order of the string , Output the string in reverse order .

Input format ：

The input gives no more than 80 In characters 、 Non empty string ending with carriage return .

Output format ：

Output the string in reverse order on one line .

sample input ：

Hello World!

sample output ：

!dlroW olleH

Code : 

#include <stdio.h>
int main(){
    char a[80];
    int i;
    for(i=0;(a[i]=getchar())!='\n';i++);
    i=i-1;
    for(i;i>0;i--)printf("%c",a[i]);
    printf("%c",a[0]);
}