vector

Newsgroup: comp.lang.c++

Subject: vector

From: Rosario1903 <Rosario@...>

Date: Thu, 28 Nov 2013 10:59:07 +0100





why the below goes to seg fault?



#include <iostream>

#include <vector>

using namespace std;



void f(vector<unsigned>& v)

{v[3]=4; v[4]=9;}





int main(void)

{vector <unsigned> mv;



mv[0]=1; mv[1]=2;

f(mv);

cout<<"mv[0]="<<mv[0]<<", mv[1]="<<mv[1]<<"\n";

cout<<"mv[3]="<<mv[3]<<", mv[4]="<<mv[4]<<" mv[5]="<<mv[5]<<"\n";



return 0;

}

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