[dundugadu]

 #include <iostream>
using namespace std;

int main()
{
  int grade[4];
  int average;
  cout << "please enter four numeric grades to get the average.\n\n";
  cin >> grade[0] >> endl;
  cin >> grade[1] >> endl;
  cin >> grade[2] >> endl;
  cin >> grade[3] >> endl;
  average = (grade [0] + grade[1] + grade[2] + grade[3]) / 4;
  cout << average << " is your average grade.";
  return 0;
} 

For some reason I don't get any compiler errors but when I run the program I get the error "Bus error (core dumped)" after I enter the second number into the program and press enter. I am not sure what is wrong with my code. I don't see any syntax errors and I don't believe I have misused the array either.

[JackOfAllTrades]

Get rid of the endls at the end of your input calls.

[fountainoftruth]

endl = end line

Basically, you shouldn't have it with your cins at all. At the end of your cout statements would be fine, though.