Thread: How to stratify a population?

Hello there,
I am new to this board. Let me introduce myself, I'm Matt, 21yo, beginner in C, french.
I got a problem here.
I do not know how to stratify a population. By that I mean I want to do the following (examples):

Code:

individual[1] = {18, 2, 1600, 3, TRUE}
individual[2] = {7, 1, 1700, 2, FALSE}
individual[3] = {41, 2, 1800, 2, FALSE}
individual[4] = {72, 1, 1500, 1, TRUE}

On a total of 100 individuals, so I guess individual[100] would be the population's amount.
But I would like to set settings for each individual in this population. So that I can make individuals into categories.
The values I showed stand for (age, job, salary, religion, bool isInASyndicate)
Then I could obtain the number of syndicated people, adult people, children people, muslim and christian people etc. into variables like
int numberOfFactoryWorkers
int numberOfMuslims
int numberOfAdults
int numberOfSeniors
Etc.
int populationTotal...

Thank you very much for helping me!