Answer to Question #100701 in C++ for x123

Question

There are 8 boys and 6 girls in a classroom. Calculate the following:
1. Ratio of boys to girls
2. Ratio of girls to boys
3. Ratio of boys to overall total
4. Ratio of girls to overall total

Answer 1

#include <iostream>

using namespace std;

//In this version we use cout << instead printf, so we need to using namespace std;

void main()

{

const int Boys = 8;

const int Girls = 6;

//We create constants of type int, because the number of boys and girls

//is an integer that does not change during the program

double boys_to_girls, girls_to_boys, boys_to_total, girls_to_total;

//We create variables of type double for each ratio

//We do not use the int type for this, since we want to calculate the rations as a number with a fractional part

boys_to_girls = (double)Boys / Girls; //Calculating rations.

//We write(double)Boys to temporarily change the type of the Boys variable to double.

//When dividing int by int, we always get an integer value, but we need a fractional one.

//Therefore we divide dobule by int, getting double.

girls_to_boys = (double)Girls / Boys;

boys_to_total = (double)Boys / (Boys + Girls);

girls_to_total = (double)Girls / (Boys + Girls);

cout << "Ratio of boys to girls: " << boys_to_girls << "\n"; //\n - escape sequence, newline

cout << "Ratio of girls to boys: " << girls_to_boys << "\n";

cout << "Ratio of boys to overall total: " << boys_to_total << "\n";

cout << "Ratio of girls to overall total: " << girls_to_total << "\n\n";

return;

}

VERSION WITH printf()

#include <iostream>

void main()

{

const int Boys = 8;

const int Girls = 6;

//We create constants of type int, because the number of boys and girls

//is an integer that does not change during the program

double boys_to_girls, girls_to_boys, boys_to_total, girls_to_total;

//We create variables of type double for each ratio

//We do not use the int type for this, since we want to calculate the rations as a number with a fractional part

boys_to_girls = (double)Boys / Girls; //Calculating rations.

//We write(double)Boys to temporarily change the type of the Boys variable to double.

//When dividing int by int, we always get an integer value, but we need a fractional one.

//Therefore we divide dobule by int, getting double.

girls_to_boys = (double)Girls / Boys;

boys_to_total = (double)Boys / (Boys + Girls);

girls_to_total = (double)Girls / (Boys + Girls);

printf("%s %f\n", "Ratio of boys to girls :", boys_to_girls);

printf("%s %f\n", "Ratio of girls to boys: ", girls_to_boys);

printf("%s %f\n", "Ratio of boys to overall total: ", boys_to_total);

printf("%s %f\n\n", "Ratio of girls to overall total: ", girls_to_total);

return;

}

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