Hello all, So I recently started learning c for school, and I've written this program to try and average three months of rainfall. My problem is stemming from the fact that with this variation of the code i get this error: "binary '/': 'std::basic_string<char,std::char_traits<char>,std::allocator <char>>' does not define this operator or a conversion to a type acceptable to the predefined operator" which makes me think that maybe i can't do math with the string operator? Not sure how to fix this. When i try it without the "/" and just the addition of the rainfall numbers, it doesnt add them and just stack them together so instead of 1 2 3 =6 it goes 1 2 3 = 123. Any help would be much appreciated.

    #include<iostream>
#include<string>
using namespace std;

int main()
{
    string month1;
    string month2;
    string month3;
    string total;
    string rainfall1;
    string rainfall2;
    string rainfall3;

    cout << "This program calculates average rainfall in inches from three different months. \n";
    cout << "First month: "; 
    cin.sync();
    getline(cin, month1);
    cout << "Second month:";
    cin.sync();
    getline(cin, month2);
    cout << "Third month:";
    cin.sync();
    getline(cin, month3);
    cout << "Rainfall for first month: ";
    cin.sync();
    getline(cin, rainfall1);
    cout << "Rainfall for second month:";
    cin.sync();
    getline(cin, rainfall2);
    cout << "Rainfall for the third month: ";
    cin.sync();
    getline(cin, rainfall3);

    total = (rainfall1   rainfall2   rainfall3) / 3;

    cout << "Average monthly rainfall for " << month1 << ", " << month2 << ", and " << month3;
    cout << " is " << total << " inches\n";

    return 0;
}