C++ examples for Function:Function Parameter
Demonstrate passing structure by reference
#include <iostream> using namespace std; struct Measure/*from w w w. ja v a 2 s . c o m*/ { int feet; float inches; }; void scale( Measure&, float ); //function void engldisp( Measure ); //declarations int main() { Measure d1 = { 12, 6.5 }; //initialize d1 and d2 Measure d2 = { 10, 5.5 }; cout << "d1 = "; engldisp(d1); //display old d1 and d2 cout << "\nd2 = "; engldisp(d2); scale(d1, 0.5); //scale d1 and d2 scale(d2, 0.25); cout << "\nd1 = "; engldisp(d1); //display new d1 and d2 cout << "\nd2 = "; engldisp(d2); cout << endl; return 0; } // scales value of type Measure by factor void scale( Measure& dd, float factor) { float inches = (dd.feet*12 + dd.inches) * factor; dd.feet = static_cast<int>(inches / 12); dd.inches = inches - dd.feet * 12; } // display structure of type Measure in feet and inches void engldisp( Measure dd ) //parameter dd of type Measure { cout << dd.feet << "\'-" << dd.inches << "\""; }