Arithmetic Conversions

Arithmetic conversions are used for matching operands of arithmetic operators, and proceed in the following order:

Operand Type	Conversion
One operand has long double type	The other operand is converted to long double type.
One operand has double type	The other operand is converted to double.
One operand has float type	The other operand is converted to float.
One operand has unsigned long long int type	The other operand is converted to unsigned long long int.
One operand has long long int type	The other operand is converted to long long int.
One operand has unsigned long int type	The other operand is converted to unsigned long int.
One operand has unsigned int type and the other operand has long int type and the value of the unsigned int can be represented in a long int	The operand with unsigned int type is converted to long int.
One operand has unsigned int type and the other operand has long int type and the value of the unsigned int cannot be represented in a long int	Both operands are converted to unsigned long int
One operand has long int type	The other operand is converted to long int.
One operand has unsigned int type	The other operand is converted to unsigned int.
Both operands have int type	The result is type int.

Note: The rules for arithmetic conversions in extended mode are different.