C++ Runnable Snippets

Marchete

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01 List of Snippets

02 Passing a function as parameter

03 Filling an array with some initial value

04 Sorting a vector

Previous: Passing a function as parameter Next: Sorting a vector

Filling an array with some initial value

Filling an static int array

Filling a vector array

Filling a vector array

The object for initialization is a complex one. std::fill works exactly the same.

Avoid memset as much as possible:

#include <bits/stdc++.h> 
using namespace std;
class Pod{
public:    
    float x,y;
    float vx,vy;
    Pod(){ } //No initialization
    Pod(float _x,float _y, float _vx, float _vy){
        x=_x;y=_y;vx=_vx;vy=_vy;
    }
};
vector<Pod> dynArray;
const Pod InitValue(0.6f,11.2f,0.45f,0.99f);
int main()
{
    dynArray.resize(3000);
    cout << "Uninitialized Vector:"<<dynArray.back().x<<","<<dynArray.back().y<< endl;
    std::fill(dynArray.begin(),dynArray.end(),InitValue);
    cout << "Array filled with:"<<dynArray.back().x<<","<<dynArray.back().y<< endl;
}

Check http://en.cppreference.com/w/cpp/algorithm/fill for more info

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