A small transform function from vector<string> to vector<vector<int>>

transform.cpp

#include <iostream>
#include <vector>
#include <string>
#include <cstdlib>

using namespace std;

vector< vector<int> > transform2IntVecVec (vector<string> vs){

	vector< vector<int> > vvI;

	// read the line by line
	for (int i = 0 ; i < vs.size() ; ++i){

		vector<int> tmp;

		for (int j = 0 ; j <vs[i].length() ; ++j){

			int deli = vs[i].find(",", j);

			if (deli<0) {
				break;
			}

			tmp.push_back(atoi(vs[i].substr(j, deli-j).c_str()));
			j = deli;
		}

		vvI.push_back(tmp);

	}

	return vvI;
}

int main(){

	vector<string> vs;
	vector< vector<int> > vvI;
	vs.push_back("9,13,10,11,14,7,10,7,12,15,7,11");

	vvI = transform2IntVecVec(vs);

	// for (std::vector<string>::iterator i = vs.begin(); i!=vs.end() ; ++i){
	// 	cout<<*i<<endl;
	// }

	for (int i = 0 ; i<vvI.size() ; ++i){
		for (int j = 0 ; j<vvI[i].size() ; ++j){
			cout<<vvI[i][j]<<endl;
		}
	}

	return 0;
}