Given four types of variables, namely int, char, float and double, the task is to write a program in C or C++ to find the size of these four types of variables.

Examples:

Input: int
Output: Size of int = 4

Input: double
Output: Size of double = 8

Here is a list of all the data types with its size, range and the access specifiers:

To find the size of the four variables:

1. The four types of variables are defined in integerType, floatType, doubleType and charType.
2. The size of the variables is calculated using the sizeof() operator.

Below is the C and C++ program to find the size of int, char, float and double data types:

C

// C program to find the size of int, char,
// float and double data types

#include 

int main()
{
	int integerType;
	char charType;
	float floatType;
	double doubleType;

	// Calculate and Print
	// the size of integer type
	printf("Size of int is: %ld\n",
		sizeof(integerType));

	// Calculate and Print
	// the size of charType
	printf("Size of char is: %ld\n",
		sizeof(charType));

	// Calculate and Print
	// the size of floatType
	printf("Size of float is: %ld\n",
		sizeof(floatType));

	// Calculate and Print
	// the size of doubleType
	printf("Size of double is: %ld\n",
		sizeof(doubleType));

	return 0;
}

C++

// C++ program to find the size of int, char,
// float and double data types
#include 
using namespace std;

int main()
{
	int integerType;
	char charType;
	float floatType;
	double doubleType;

	// Calculate and Print
	// the size of integer type
	cout << "Size of int is: " <<
	sizeof(integerType) <<"\n";

	// Calculate and Print
	// the size of doubleType
	cout << "Size of char is: " <<
	sizeof(charType) <<"\n";
	
	// Calculate and Print
	// the size of charType
	cout << "Size of float is: " <<
	sizeof(floatType) <<"\n";

	// Calculate and Print
	// the size of floatType
	cout << "Size of double is: " <<
	sizeof(doubleType) <<"\n";

	return 0;
}

Output:

Size of int is: 4
Size of char is: 1
Size of float is: 4
Size of double is: 8