#include #include using namespace std; class CS2; class CS{ private: int NOfS; string Name; int RegNo; public: CS(); CS(int s,string name,int ro); friend void input_details(CS &a ,CS2 &b); friend void Output_details1(CS a); friend void P1(CS a); }; CS::CS(){ NOfS = 0; Name = '\0'; RegNo = 0; } CS::CS(int s,string name,int ro){ NOfS = s; Name = name; RegNo = ro; } class CS2{ private: int NOfS2; string Name2; int RegNo2; public: CS2(); CS2(int s,string name,int ro); friend void input_details(CS &c ,CS2 &d); friend void Output_details2(CS2 b); friend void P2(CS2 b); }; CS2::CS2(){ NOfS2 = 0; Name2 = '\0'; RegNo2 = 0; } CS2::CS2(int s,string name,int ro){ NOfS2 = s; Name2 = name; RegNo2 = ro; } void input_details(CS &a ,CS2 &b){ cin >> a.NOfS; cin >> a.Name; cin >> a.RegNo; cin >> b.NOfS2; cin >> b.Name2; cin >> b.RegNo2; } void Output_details1(CS a){ cout << a.NOfS << endl; cout << a.Name << endl; cout << a.RegNo << endl; }; void P1(CS a){ // Let total syudents are 200 cout << "Percentage 1 : " << a.NOfS / 2 << "%" << endl; } void Output_details2(CS2 b){ cout << b.NOfS2 << endl; cout << b.Name2 << endl; cout << b.RegNo2 << endl; }; void P2(CS2 b){ cout << "Percentage 2 : " << b.NOfS2 / 2 << "%" << endl; } int main(){ CS A(53245,"saad",43); CS2 B(5325,"saif",49); input_details(A,B); Output_details1(A); Output_details2(B); P1(A); P2(B); }

Two Classes Share Data using Friend Function