I am having trouble finding out whats wrong with this code

please rewrite this c++ program in C++ to calculate the grade average when the user inputs 3 grades

#include #include #include //added using namespace std; //added

string lastName; int stuScore; float totPoints; int i; string message; float grade;

int main(){

cout << "Enter last name:" << endl; cin >> lastName; cout << lastName << " "; for (int i = 0; i <= 3; i++){ cout << "Enter grade " << i << " : "; cin >> stuScore; totPoints += stuScore; grade = totPoints / i; if (grade > 90) message = "Excellent"; if (grade > 80) message = "Well Done"; if (grade > 70); message = "Good"; if (grade > 60) message = "Need Improvement"; if (grade < 60) message = "Fail"; } cout << grade << "%, " << message << endl; return 0; }