Chapter 3, Problem 1E

Type in and run the five programs presented in this chapter. Compare the output produced by each program with the output presented after each program in the text.

Program Plan Intro

Data types:

The variables use data-type during their declaration.

• The data-type is used to determine the size of memory allocated. Here, the compiler allots the memory.
• All data-type needs different size of memory.

Some of the data-types are:

• Integer
• Boolean
• Character
• Double
• Floating point

Integer data type:

The “int” is a keyword for floating point datatype.

It is a number and it cannot have a fractional part. It may be a positive value, a negative value or zero.

• Integer data type uses 4 bytes of memory.

Boolean data type:

The “_Bool” is a keyword for floating point datatype.

• A Boolean data type is a data type that represents the two values.
• The two values are “true” and “false”.

Character data type:

A “char” is a keyword for character data type.

• Character data type stores the characters.
• Character data type requires one byte memory space.
• The character should always place inside the single quotes.

Double data type:

The “double” is a keyword for floating point datatype.

The size of the double variable contains 8 bytes.

It can represent real numbers, minus and decimal numbers.

Floating point data type:

The “float” is a keyword for floating point datatype.

• The data type “float” stores single precision floating point decimal values.
• The memory space used for float is “four” bytes.

Explanation of Solution

Program:

Consider the five programs presented in the given chapter.

Program 3.1:

//include the header file

#include <stdio.h>

//definition of main method

int main (void)

{

/*declare and initialize the value to the required variables*/

int integerVar = 100;

float floatingVar = 331.79;

double doubleVar = 8.44e+11;

char charVar = 'W';

_Bool boolVar = 0;

//display the result

printf ("integerVar = %i\n", integerVar);

printf ("floatingVar = %f\n", floatingVar);

printf ("doubleVar = %e\n", doubleVar);

printf ("doubleVar = %g\n", integerVar);

printf ("charVar = %c\n", charVar);

printf ("boolVar = %i\n", boolVar);

//return statement

return 0;

}

Explanation:

In the above program, declare the variables with different data types and assign values to that variables. Then display the values using “printf” function on the output screen.

Sample Output

Sample Output for program 3.1:

integerVar = 100

floatingVar = 331.790009

doubleVar = 8.440000e+11

doubleVar = 8.44e+11

charVar = W

boolVar = 0