c++ program to read STUDENT details and calculate average of 2 better marks for each student

#include
#include
using namespace std;


class student
{
private: char name[20];
int usn;
int m1,m2,m3;
float avg;
public: void read();
void show();
float average();
};



void student :: read()
{
cout<
cin>>usn;
cout<<"Enter student name:";
cin>>name;
cout<<"Enter marks in 3 subjects:";
cin>>m1>>m2>>m3;
}


float student :: average()
{
if(m1
avg=float((m2+m3)/2);
else if(m2
avg=float((m1+m3)/2);
else
avg=float((m1+m2)/2);
return avg;
}


void student :: show()
{
cout<
}


int main()
{
student s[20];
int i, n;


cout<
cin>>n;


for(i=0;i
s[i].read();
cout<
cout<
for(i=0;i
{
s[i].average();
s[i].show();
}


return 0;
}