ucompos1.cpp

ucompos1.cpp

#include ‹iostream.h›

#include ‹math.h›

#include ‹stl.h›

struct square_root: public unary_function‹double, double› {

 square_root() {}

 double operator() (double x_) const {return sqrt(x_);}

};

int input[3] = {-1, -4, -16};

int main() {

 int output[3];

 transform(input, input + 3, output, unary_compose‹square_root, negate‹int› ›(square_root(), negate‹int›()));

 for (int i = 0; i ‹ 3; i++) cout ‹‹ output[i] ‹‹ endl;

 return 0;

}