runtime error

[mickey]

Hi,
I coded that loop and get me the attach error. What's wrong? (trace debug shows me the runtime-error on 'return 0' )
thanks.

int main (int argc, char** argv) {	
......................
vector<Unit> u(lines);
cout << "Weight " << u[0]._weight << " " << u[1]._weight << " " << u[2]._weight << "\n";
	for (int i=0; i < example.size(); i++) {		
		for (int j=0; j < example[i].size(); j++) {
			if (j < example[i].size() -1) {
					u[j]._input = example[i][j];
					cout << u[j]._input << endl;
			}
			else 				
				u[j]._target = example[i][j]; //without this nothing problem (?)
				//u[j]._input = example[i][j]; //with this no problem!
		}
			printf("\n");
	}
	return 0;
}

int main (int argc, char** argv) {	
......................
vector<Unit> u(lines);
cout << "Weight " << u[0]._weight << " " << u[1]._weight << " " << u[2]._weight << "\n";
	for (int i=0; i < example.size(); i++) {		
		for (int j=0; j < example[i].size(); j++) {
			if (j < example[i].size() -1) {
					u[j]._input = example[i][j];
					cout << u[j]._input << endl;
			}
			else 				
				u[j]._target = example[i][j]; //without this nothing problem (?)
				//u[j]._input = example[i][j]; //with this no problem!
		}
			printf("\n");
	}
	return 0;
}

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