POJ 3650 The Seven Percent Solution

#include<stdio.h>

int main()
{
    char input;
    while( (input = getchar()) != '#') {
        switch(input) {
        case ' ' : printf("%s","%20"); break;
        case '!' : printf("%s","%21"); break;
        case '$' : printf("%s","%24"); break;
        case '%' : printf("%s","%25"); break;
        case '(' : printf("%s","%28"); break;
        case ')' : printf("%s","%29"); break;
        case '*' : printf("%s","%2a"); break;
        default : printf("%c", input); break;
        }
    
    } 
    return 0;
}