Inline Functions http://cs.mst.edu #include <iostream> using - - PowerPoint PPT Presentation

http://cs.mst.edu

Inline Functions

http://cs.mst.edu

#include <iostream> using namespace std; float calc_iq( const float hatsize, const int age, const float num_feet); inline float square(const float x) {return x*x;} void some_other_function (char broiled, float other_stuff); int main() { float y = square (6.2); return 0; }

http://cs.mst.edu

#include <iostream> using namespace std; float calc_iq( const float hatsize, const int age, const float num_feet); inline float square(const float x) {return x*x;} void some_other_function (char broiled, float other_stuff); int main() { float y = square (6.2); return 0; }

http://cs.mst.edu

#include <iostream> using namespace std; float calc_iq( const float hatsize, const int age, const float num_feet); inline float square(const float x) {return x*x;} void some_other_function (char broiled, float other_stuff); int main() { float y = square (6.2); return 0; } int main() { float y = 6.2 * 6.2; return 0; }

http://cs.mst.edu

When and Why

• You will inline a function only if it is relatively

small

• Reduces some of the overhead cost of calling a

function

• With the function being called once, twice, or

even 1000 times, the speed up will almost certainly not be noticed

http://cs.mst.edu

End of Session