Simplifies single-line matrix formatting

mat.cc

#include <iostream>
#include <string>
#include <cstdlib>
#include <queue>

using namespace std;

void usage(string cmd) {
	cout << "Usage: " << cmd << " [rows] [cols]" << endl;
}

int main(int argc, const char **argv) {
	int rows, cols;

	if (argc < 3) {
		usage(argv[0]);
		return 0;
	}

	rows = atoi(argv[1]);
	cols = atoi(argv[2]);

	cout << "Input " << rows << " rows, line separated (" << cols << " columns space separated): " << endl;

	queue<string> rowVals;
	for (int row = 0; row < rows; row++) {
		string in;
		getline(cin, in);
		rowVals.push(in);
	}

	cout << "[";
	for (int row = 0; row < rows; row++) {
		cout << "[";
		string rowComma = (row == rows - 1) ? "" : ",";
		
		string rowString = rowVals.front();

		for (int i = 0; i < rowString.length(); i++) {
			if (rowString[i] == ' ')
				cout << ",";
			else
				cout << rowString[i];
		}

		rowVals.pop();
		cout << "]" << rowComma;
	}
	cout << "]" << endl;
}