What is the difference between these two alternatives? Are there performance tradeoffs? Any help appreciated. Examples below.
Code://Pass by pointer void negate(int * pn) { *n=-*n; } void func() { int m=10; negate(&m);//pass m's address< std::cout<<m<<std::endl; //display: -10 } //Pass by reference void negate(int & n) { >n=-n;//modifies caller's argument } void func() { int m=10; negate(m);//pass by reference std::cout<<m<<std::endl; //diplay: -10 }