从整数中获取浮点值

integer_value = 42
float_value = float(integer_value)

int integerValue = 42;
double floatValue = (double) integerValue;

let integerValue = 42;
let floatValue = parseFloat(integerValue);

int integerValue = 42;
double floatValue = static_cast<double>(integerValue);

int integerValue = 42;
double floatValue = Convert.ToDouble(integerValue);