C++ perkalian dengan penjumlahan

#include <iostream>
#include <string>
#include <math.h>
#include <cstdlib>

using namespace std;

/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char *argv[]) {
int a,b,i,j,hasil;

cout<<"masukkan bilangan a : ";
cin>>a;
cout<<"masukkan bilangan b : ";
cin>>b;

for(i=0;i<b;i++){
cout<<a<<"+";
}
hasil=a*b;
cout<<"= "<<hasil;
return 0;
}