Increment the value of a map - c++

Question

need your help and better if you can help me fast. It is very trivial problem but still can't understand what exactly i need to put in one line.
The following code i have
for (busRequest = apointCollection.begin(); busRequest != apointCollection.end(); busRequest++)
{
double Min = DBL_MAX;
int station = 0;
for (int i = 0; i < newStations; i++)
{
distance = sqrt(pow((apointCollection2[i].x - busRequest->x1), 2) + pow((apointCollection2[i].y - busRequest->y1), 2));
if (distance < Min)
{
Min = distance;
station = i;
}
}
if (people.find(station) == people.end())
{
people.insert(pair<int, int>(station, i));
}
else
{
how can i increment "i" if the key of my statation is already in the map.
}
}
Just briefly what i do , i take the first busrequest go to the second loop take the first station and find the minimum distance. After i go over the second loop , i add that station with minimum distance to my map . After i proceed with all my loops and if there is the same station , i need to increment it , so it means that that station is using two times and etc.
I need the help just give me hint or provide the line that i need to add.
I thank you in advance and waiting for your help.

Answer 1

And I think you meant Min Distance instead of i? Check and let me know.
for (busRequest = apointCollection.begin(); busRequest != apointCollection.end(); busRequest++)
{
double Min = DBL_MAX;
int station = 0;
for (int i = 0; i < newStations; i++)
{
distance = sqrt(pow((apointCollection2[i].x - busRequest->x1), 2) + pow((apointCollection2[i].y - busRequest->y1), 2));
if (distance < Min)
{
Min = distance;
station = i;
}
}
if (people.find(station) == people.end())
{
people.insert(pair<int, int>(station, i)); // here???
}
else
{
// This routine will increment the value if the key already exists. If it doesn't exist it will create it for you
YourMap[YourKey]++;
}
}

Answer 2

In C++ you can directly access a map key without inserting it. C++ will automatically create it with default value.
In your case, if a station is not present in people map and you will access people[station] then people[station] will automatically be set to 0 ( default value of int is 0 ).
So you can just do this:
if (people[station] == 0)
{
// Do something
people[station] = station; // NOTE: i is not accessible here! check ur logic
}
else
{
people[station]++;
}
Also: In your code i cannot be accessed inside IF condition to insert into people map.