Arithmetic Conversions

The operands of binary operators do implicit conversions:

• If either operand has type long double, the other operand is converted to long double.
• If either operand has type double, the other operand is converted to double.
• If either operand has type float, the other operand is converted to float.
• The integral promotions are performed on both operands.

The following rules are applied:

• If either operand has type unsigned long int, the other operand is converted to unsigned long int.
• If one operand has type longint and the other has type unsignedint, then:
  • if a longint can represent all values of an unsignedint, the operand of type unsignedint is converted to longint;
  • if a long int cannot represent all the values of an unsignedint, both operands are converted to unsignedlongint.
• If either operand has type longint, the other operand is converted to longint.
• If either operand has type unsignedint, the other operand is converted to unsignedint.
• Both operands have type int.