Programming in C++, 2nd Edition

Comments 141

4.8.3 sizeof()

The sizeof() operator is used to return size occupied in bytes in memory by the variable. The

sizeof() operator in C++ displays different values as compared to C. The following program

illustrates this.

4.30 Write a program to display number of bytes occupied by char data type.

#include<iostream.h>

#include<conio.h>

void main()

{

clrscr();

cout<<sizeof(‘a’);

}

OUTPUT

1

Explanation: In the above program, a character constant is used, sizeof( ) operator. The size

determined is 1 byte. The same program ‘C’

will display the size 2 bytes, because C and

C++ reacts differently with data types. In C,

‘a’ ...