如何在Visual C ++中将浮点文字处理为double还是float?

问题描述:

假设 float a =(1.5 * b)其中 b 是浮点数,那么该表达式如何求值?
1.5 是否被视为double或float?

Suppose float a = (1.5 * b) where b is float then how is this expression evaluated? Is 1.5 treated as double or float?

1.5是double,使用1.5f进行浮点运算,其实际作用是:

1.5 is double, use 1.5f for float, what it actually does:

float a =(float)(1.5 *(double)b)