Answer 1

https://code.sololearn.com/ctB4nrCajCd5
#include <iostream>
using namespace std;
int main(void) {
int i;
double sum, avg, min, max;
double bankBalances[20] =
{300.0, 500.0, 250.0, 600.0, 1000.0,
400.0, 800.0, 450.0, 600.0, 2200.0,
200.0, 900.0, 250.0, 650.0, 1200.0,
700.0, 500.0, 350.0, 700.0, 1600.0,
};
/*for (i = 0; i < 20; i++) {
cout << "Enter bank balance n°" << i << endl;
cin >> bankBalances[i];
}*/
sum = 0;
min = bankBalances[0];
max = bankBalances[0];
for (i = 0; i < 20; i++) {
sum += bankBalances[i];
if (bankBalances[i] < min) {
min = bankBalances[i];
} else if (bankBalances[i] > max) {
max = bankBalances[i];
}
}
avg = sum / 20.0;
cout << "Average: " << avg << endl;
cout << "Minimum: " << min << endl;
cout << "Maximum: " << max << endl;
return 0;
}