How to resolve the algorithm Variable size/Set step by step in the C++ programming language

Published on 7 June 2024 03:52 AM
#cpp

How to resolve the algorithm Variable size/Set step by step in the C++ programming language

Table of Contents

Problem Statement

Demonstrate how to specify the minimum size of a variable or a data type.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm Variable size/Set step by step in the C++ programming language

The provided C++ code prints the ranges of C++ primitive data types on the console. It includes the necessary headers, primarily <boost/cstdint.hpp> for defining boost::int_least32_t and <climits> and <cfloat> for obtaining the min and max values.

Within the main function, it iterates through various primitive data types, such as char, short int, int, long long int, float, and double, and prints their respective minimum and maximum values using std::cout.

Here's a breakdown of the code:

  • It includes the necessary headers:

    • <boost/cstdint.hpp> for accessing boost::int_least32_t.
    • <climits> and <cfloat> for obtaining the min and max values of C++ primitive data types.

  • It declares a boost::int_least32_t foo;, but its usage is not shown in this code.

  • The main function is the entry point of the program.

  • Inside the main function, it prints the ranges of primitive data types using std::cout. It prints the minimum and maximum values for each data type, such as:

    • char, short char, unsigned char
    • short int, unsigned short int
    • int, unsigned int
    • long int, unsigned long int, long long int, unsigned long long int
    • float
    • double

  • It follows the format of printing the data type name, the range (minimum and maximum values), and then a newline character to separate each data type's output.

  • The program concludes by printing the ranges of all supported primitive data types.

Source code in the cpp programming language

#include <boost/cstdint.hpp>

boost::int_least32_t foo;


#include <iostream>
#include <climits>
#include <cfloat>

int main() {
	std::cout << "The ranges of C++'s primitive data types are:" << std::endl << std::endl;

	std::cout << "a  char ranges from          : " << CHAR_MIN << " to " << CHAR_MAX << std::endl;
	std::cout << "a  short char ranges from    : " << SCHAR_MIN << " to " << SCHAR_MAX << std::endl;
	std::cout << "an unsigned char ranges from : " << 0 << " to " << UCHAR_MAX << std::endl << std::endl;

	std::cout << "a  short int ranges from          : " << SHRT_MIN << " to " << SHRT_MAX << std::endl;
	std::cout << "an unsigned short int ranges from : " << 0 << " to " << USHRT_MAX << std::endl << std::endl;

	std::cout << "an int ranges from          : " << INT_MIN << " to " << INT_MAX << std::endl;
	std::cout << "an unsigned int ranges from : " << 0 << " to " << UINT_MAX << std::endl << std::endl;

	std::cout << "a  long int ranges from               : " << LONG_MIN << " to " << LONG_MAX << std::endl;
	std::cout << "an unsigned long int ranges from      : " << 0 << " to " << ULONG_MAX << std::endl;
	std::cout << "a  long long int ranges from          : " << LLONG_MIN << " to " << LLONG_MAX << std::endl;
	std::cout << "an unsigned long long int ranges from : " << 0 << " to " << ULLONG_MAX <<std::endl << std::endl;

	std::cout << "a  float ranges from : " << -FLT_MAX << " to " << +FLT_MAX << std::endl << std::endl;

	std::cout << "a  double ranges from : " << -DBL_MAX << " to " << +DBL_MAX << std::endl;
}

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