C/C++ :: Creating Multiple Sine Waves

#include <cstdlib>
#include <iostream>
#include <math.h>
#include <cstdio>
#include <stdio.h>
#include "dp_lib.h"
int main() {
int A =1;
float* data;

[Code] ...

I am doing ive written this code that creates 2 sine waves and adds them together but my question is that im trying to write a code where i can create multiple sine waves assign each sine wave to a separate values (musical notes ie A B C) and then be able to add them together in any order to create a tune.