Where is error in my code? Plz locate?

Question

#include <iostream>
using namespace std;
class result
{
private:
int rno;
int marks[3]; //for storing marks
char name[50]; //for storing names
public:
void input()
{
cout<<"Enter rno:";
cin>>rno;
cout<<"Enter name";
gets(name);
//for loop for storing values in marks
for(int i=0; i<3; i++){
cout<<"Enter marks of 3 subjects:\n";
cin>>marks[i];
}
void show()
{
cout<<"Roll No.:"<<rno<<endl;
cout<<"Name:"<<name<<endl;
for(int i<0; i<3; i++)
cout<<"Marks["<<i<<"]"<<marks[i]<<endl;
}
int total()
{
int t=0;
for(int i=0; i<3; i++)
t=t + marks[i];
return t;
}

float avg(){
for(int i=0; i<3; i++)
t=t+marks[i];
return t/3.0;
}
};
int main(){
result r;
r.input();
r.show();
cout<<"Total is"<<r.total();
cout<<"Average is"<<r.avg();
return 0;
}

Answer 1

Use fgets() function instead of gets() and also include string headerfile check all parentheses properly

Answer 2

As A.S. suggested use fgets() instead of gets(),

In show method implementation ,init condition is wrong should be i=0,

In avg method declare t ,bcz t declared in total hasn't scope outside of total,