In a population, the birth rate and death rate are calculated as follows: Birth

Question

In a population, the birth rate and death rate are calculated as follows:
Birth Rate = Number of birth / population
Death Rate = Number of death / population

for example, in a population of 100,000 that has 8,000 births and 6,000 deaths per year, the birth and death rate are:
Birth Rate = 8,000 / 100,000 = 0.08
Death Rate = 6,000 / 100,000 = 0.06

Design a Population class that stores a population, number of birth, and number of deaths for a period of time. Member function should return the birth rate and death rate. Implement the class in a program

Input Validation: Do not accept population figures less than 1, or birth or death number less then 0.

Explanation / Answer

class pop
(
public:
pop(int n, int b, int d)
{
if(n<1) exit 0;
else no = n;

if(b<0) exit 0;
else birth = b;

if(d<0) exit 0;
else death = d;
}

int brate()
{
return (float)birth/no;
}

int drate()
{
return (float)dedath/no;
}

private:
int birth, death, no;

}

 

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