copysign
The C++
copysign()function returns a value with the magnitude of first argument and sign of second argument. It takes the two arguments. It is also defined in the<cmath>header file.
Syntax
copysign(x, y);
Parameters
The copysign() function takes two arguments which,
x– Value with the magnitude of the resulting value.y– Value with the sign of the resulting value.
Return value
Returns value with the magnitude of x and the sign of y.
copy sign
copysign() prototype
double copysign(double x, double y); float copysign(float x, float y); long double copysign(long double x, long double y); Promoted copysign(Type1 x, Type2 y); // Additional overloads for arithmetic types
Example 1 : C++ copysign()
#include <stdio.h> #include <math.h> int main () { printf ("copysign ( 10.0,-1.0) = %f\n", copysign( 10.0,-1.0)); printf ("copysign (-10.0,-1.0) = %f\n", copysign(-10.0,-1.0)); return 0; }
Output
copysign ( 10.0,-1.0) = -10.000000 copysign (-10.0,-1.0) = -10.000000
std copysign
Example 2 : C++ copysign() with arguments of same type
#include <iostream> #include <cmath> using namespace std; int main() { double x = 13.15, y = -23.0, result; result = copysign(x, y); cout << "copysign(" << x << "," << y << ") = " << result << endl; return 0; }
Output
copysign(13.15,-23) = -13.15
Example 3 : C++ copysign() with arguments of different type
#include <iostream> #include <cmath> using namespace std; int main() { double x = 14.15, result; int y = -24; result = copysign(x, y); cout << "copysign(" << x << "," << y << ") = " << result << endl; return 0; }
Output
copysign(14.15,-24) = -14.15