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help me!

Jamesfreak (3)
i put in this code, and got errors on my else ifs. i have looked through everything and cant find the answer to my question! please help!

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  #include<iostream>;
#include<string>;

using std::cin;
using std::cout;
using std::string;
using std::endl;

int main()
{
	//Grade Point Average

	double grade1 = 0.0;
	double grade2 = 0.0;
	double grade3 = 0.0;
	double grade4 = 0.0;
	double grade5 = 0.0;
	double grade6 = 0.0;
	double grade7 = 0.0;
	double grade8 = 0.0;
	double grade9 = 0.0;
	double grade10 = 0.0;
	double gpa = 0.0;
	bool numOfGrades = true;

	cout << "How many grades do you have?: ";
	cin >> numOfGrades;

	if (numOfGrades = 1);
	{
		cout << "Dont even ask, its the same number you would type in.";
		return 0;
	}
	else if (numOfGrades = 2);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		gpa = (grade1 + grade2) / 2;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 3);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		gpa = (grade1 + grade2 + grade3) / 3;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 4);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		gpa = (grade1 + grade2 + grade3 + grade4) / 4;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 5);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5) / 5;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 6);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6) / 6;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 7)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;

		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7) / 7;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 8);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;


		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8) / 8;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 9);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;
		cout << "What is your ninth period grade? type in percentage: ";
		cin >> grade9;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8 + grade9) / 9;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 10);
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;
		cout << "What is your ninth period grade? type in percentage: ";
		cin >> grade9;
		cout << "What is your tenth period grade? type in percentage: ";
		cin >> grade10;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8 + grade9 + grade10) / 10;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
}
wildblue (1505)
Remember there's a difference between the assignment operator = and checking for equality with ==.

The if/else if clauses do not need a semi-colon. (Nor do the include statements)

Also - if you're expecting someone to enter a number in numOfGrades, I'm wondering why it was declared as a bool type?
Jamesfreak (3)
Is this better? all it does is the first command with "1",
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#include<iostream>
#include<string>

using std::cin;
using std::cout;
using std::string;
using std::endl;

int main()
{
	
	//Grade Point Average

	double grade1 = 0.0;
	double grade2 = 0.0;
	double grade3 = 0.0;
	double grade4 = 0.0;
	double grade5 = 0.0;
	double grade6 = 0.0;
	double grade7 = 0.0;
	double grade8 = 0.0;
	double grade9 = 0.0;
	double grade10 = 0.0;
	double gpa = 0.0;
	double numOfGrades = 0.0;

	cout << "How many grades do you have?: ";
	cin >> numOfGrades;

	if (numOfGrades = 1)
	{
		cout << "Dont even ask, its the same number you would type in.";
		return 0;
	}
	else if (numOfGrades = 2)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		gpa = (grade1 + grade2) / 2;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 3)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		gpa = (grade1 + grade2 + grade3) / 3;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 4)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		gpa = (grade1 + grade2 + grade3 + grade4) / 4;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 5)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5) / 5;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 6)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6) / 6;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 7)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;

		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7) / 7;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 8)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;


		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8) / 8;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
	else if (numOfGrades = 9)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;
		cout << "What is your ninth period grade? type in percentage: ";
		cin >> grade9;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8 + grade9) / 9;
		cout << "Your GPA is: " << gpa << endl;

		return 0;
	}
	else if (numOfGrades = 10)
	{
		cout << "What is your first period grade? type in percentage: ";
		cin >> grade1;
		cout << "What is your second period grade? type in percentage: ";
		cin >> grade2;
		cout << "What is your third period grade? type in percentage: ";
		cin >> grade3;
		cout << "What is your fourth period grade? type in percentage: ";
		cin >> grade4;
		cout << "What is your fifth period grade? type in percentage: ";
		cin >> grade5;
		cout << "What is your sixth period grade? type in percentage: ";
		cin >> grade6;
		cout << "What is your seventh period grade? type in percentage: ";
		cin >> grade7;
		cout << "What is your eighth period grade? type in percentage: ";
		cin >> grade8;
		cout << "What is your ninth period grade? type in percentage: ";
		cin >> grade9;
		cout << "What is your tenth period grade? type in percentage: ";
		cin >> grade10;
		gpa = (grade1 + grade2 + grade3 + grade4 + grade5 + grade6 + grade7 + grade8 + grade9 + grade10) / 10;
		cout << "Your GPA is: " << gpa << endl;
		return 0;
	}
}
wildblue (1505)
if (numOfGrades = 1)

You're assigning the value of 1 to numOfGrades here, you're not checking to see if it's equal to 1.
nub123 (2)
use == instead of =
Last edited on
Jamesfreak (3)
thank you so very much
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