Unless you're calling a variable-argument function--floats are promoted to doubles for variable-argument functions: > The arguments are implicitly converted, a

Unless you're calling a variable-argument function--floats are promoted to doubles for variable-argument functions: > The arguments are implicitly converted, as if by assignment, to the types of the corresponding parameters, taking the type of each parameter to be the unqualified version of its declared type. The ellipsis notation in a function prototype declarator causes argument type conversion to stop after the last declared parameter, if present. The integer promotions are performed on each trailing argument, and trailing arguments that have type float are promoted to double. These are called the default argument promotions. No other conversions are performed implicitly