gpa calc

hi im making a gpa calculator for my class and am confused on how to add value to my grade. should i be using a swith statement instead of an if statement? here is my code:

Code:

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#include <string>
#include <stdio.h>
#include <cstdlib>
#include <iostream>

using namespace std;

//Input lettergrades for courses, compute their grade point, and ask which semester

int main()
{
       
        string grade, year, semester;
        float gpa, A, B, C, D, F;
       
        cout << "Please insert your letter grade for five classes:\n";
        cin >> grade >> grade >> grade >> grade >> grade;
        cout << "Please insert the semester (Fall, Spring,...):\n";
        cin >> semester;
        cout << "Please insert the year:\n";
        cin >> year;
        grade=A,B,C,D,F;
        gpa=grade+grade+grade+grade+grade/(5);
        cout << "Your grade point average for the" << year << semester << "semester is" << gpa;
        if (grade=="A")
                'A'==4.0;
        else if (grade=="B")
                'B'==3.0;
        else if (grade=="C")
                'C'==2.0;
        else if (grade=="D")
                'D'==1.0;
        else (grade=="F")
                'F'==0.0;
       
       
               
}

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I don't think your line of code were you have

Code:

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cin>> grade >> grade....

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is going to work. I would instead write

Code:

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cin>> gradeOne >> gradeTwo ...

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and then use if ladders to assign double values to "calculation variables" based off of the user input. Like:

Code:

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double gradeOneCalc = 0.0;

if (gradeOne == 'A'){
 gradeOneCalc = 4.0;}
..........................
...................
....................

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then finally

Code:

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double GPA = 0.0;

GPA = gradeOneCalc+GradeTwoCalc..... /5

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ok this is what i did where did i mess up?

Code:

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#include <string>
#include <stdio.h>
#include <cstdlib>
#include <iostream>

using namespace std;

//Input lettergrades for courses, compute their grade point, and ask which semester

int main()
{
       
        string gradeOne, gradeTwo, gradeThree, gradeFour, gradeFive, year, semester;
       
       
        cout << "Please insert your letter grade for five classes:\n";
        cin >> gradeOne >> gradeTwo >> gradeThree >> gradeFour >> gradeFive;
        cout << "Please insert the semester (Fall, Spring,...):\n";
        cin >> semester;
        cout << "Please insert the year:\n";
        cin >> year;
        double gradeOneCalc = 0.0;
        double gradeTwoCalc = 0.0;
        double gradeThreeCalc = 0.0;
        double gradeFourCalc = 0.0;
        double gradeFiveCalc = 0.0;
        if (gradeOne == "A")
                gradeOneCalc=4.0;
        else if (gradeTwo == "B")
                gradeTwoCalc=3.0;
        else if (gradeThree == "C")
                gradeThreeCalc=2.0;
        else if (gradeFour == "D")
                gradeFourCalc=1.0;
        else if (gradeFive == "F")
                gradeFiveCalc=0.0;
        double gpa = 0.0;
        gpa=gradeOneCalc+gradeTwoCalc+gradeThreeCalc+gradeFourCalc+gradeFiveCalc/(5.0);
        cout << "Your grade point average for the " << year << semester << " semester is " << gpa;
       
       
               
}

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Oh, I forgot to mention, the letter grades are not strings, but are type char.

So, you would declare them like so. I like to always assign them a value for starts personally, then reassign it later. Notice the single quote marks. Year would probably be an int value like "2010", and semester should still be a string value. It's also a good habit to declare all of your values that will be used globally (throughout the entire program) right after you declare (using namespace std;). So that you don't have a double GPA=0.0 in the middle of your code.

Code:

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char gradeOne = 'a';
char gradeTwo = 'b';

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