C++ STL Set 3 (map).cpp

//{ Driver Code Starts
#include <bits/stdc++.h>
using namespace std;

void add_value(map<int, int> &m, int x, int y);

int find_value(map<int, int> &m, int x);
void print_contents(map<int, int> &m);
int main()
{
    // your code goes here
    int t;
    cin >> t;
    while (t--)
    {
        map<int, int> m;
        int q;
        cin >> q;
        while (q--)
        {
            char c;
            cin >> c;
            if (c == 'a')
            {
                int x, y;
                cin >> x >> y;
                add_value(m, x, y);
            }
            if (c == 'b')
            {
                int y;
                cin >> y;
                cout << find_value(m, y) << " ";
            }
            if (c == 'c')
            {
                print_contents(m);
            }
        }
        cout << endl;
    }
    return 0;
}
// } Driver Code Ends

/* Adds a value with key x and value y to the map*/
void add_value(map<int, int> &m, int x, int y)
{
    m[x] = y;
}

/* Returns the value of the key
 x if present else returns -1 */
int find_value(map<int, int> &m, int x)
{
    if (m.find(x) != m.end())
    {
        return m[x];
    }
    return -1;
}

/* Prints contents of the map ie keys and values*/
void print_contents(map<int, int> &m)
{
    for (auto i : m)
    {
        cout << i.first << " " << i.second << " ";
    }
}