Overflow and Underflow

verflow is a case where operations on 2
numbers exceeds the maximum (or goes below the minimum) value the data
type can have. Usually it is assumed that integral types are very large,
and user don’t consider that sum of two numbers can be larger than the
range. If the size of a data type is n bytes, it can store 2⁸ⁿ different values. This is called the data type’s range. If size of an unsigned data type is n bytes, it ranges from 0 to 2⁸ⁿ-1. If size of a signed data type is n bytes, it ranges from -2^8n-1 to 2^8n-1-1. So, a short (usually 2 bytes) ranges from -32768 to 32767 and an unsigned short range from 0 to 65535. For example:

#include

#include

void main()

{

int a=97482, b=-62935;

clrscr();

cout<<”value of a=”<

cout<<”value of b=”<

getch();

}

Output of the Programme

value of a =31946

value of b=2601

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