example.cpp

#include <fstream>
#include <iostream>
#include <string>
#include <vector>

using namespace std;

vector<string> split(const string& line) {
	vector<string> result;
	string::size_type i = 0;
	while (i <= line.length()) {
		string::size_type j = line.find(';', i);
		result.push_back(line.substr(i, j - i));
		i = (j == string::npos) ? string::npos : j + 1;
	}
	return result;
}

int main(int argc, char* argv[]) {
	if (argc != 2) {
		cout << "usage: " << argv[0] << " <filename>" << endl;
		return -1;
	}
	
	string filename = argv[1];

	ifstream file(filename);

	if (!file) {
		cout << "could not open " << filename << endl;
		return -2;
	}

	vector<string> lines;

	string tmp;
	while (getline(file, tmp))
		lines.push_back(tmp);

	for (const string& line : lines) {
		int sum = 0;
		for (const string& value : split(line))
			sum += stoi(value);
		cout << sum << endl;
	}

	return 0;
}