Random numbers on if array

So im having this problem where im trying to get the older age of a quantity of ages. The thing is it would return random numbers at the if line. i want to know the logic behind it.

The language is C++ and im pretty sure this is very easy to solve.

#include <iostream>
#include <conio.h>

using namespace std;

int main()
{
    int edad[100], n, i, emayor=0;
    float suma;
    
    do{
     cout << "Ingrese su edad: ";
     cin >> edad[i];
     suma+=edad[i];
     i++;
     cout << "\n\nDesea Ingresar Edades? (1/0) ";
     cin >> n;
    }while(n==1 && i<100);
    cout << "La sumatoria de edades es: "<< suma;
    
    if(edad[i]>emayor){
    emayor=edad[i];
    cout << "\nLa edad mayor es: "<<emayor;

    }
        getch();
    return 0;
    }