If statement problem

[LE8p216C]

I keep getting errors for <= which I don't understand and also error for all the if statements expecting an expression. Will post my code first not done but its basically what I need to just rewash and redo for the next two students.
#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
unsigned
studentid{},
firsttest{},
secondtest{},
lab1{},
lab2{},
lab3{},
lab4{},
average{};
{
cout << "Enter student id, followed by test 1, test2, lab1, lab2, lab3, and lab4" << endl;
cin >> studentid >> firsttest >> secondtest >> lab1 >> lab2 >> lab3 >> lab4;
if (firsttest < 0 || firsttest >= 100 || secondtest < 0 || secondtest >= 100)
{
cout << "Your test score must be a valid percentage score between 0 and 100";
cout << "Enter student id, followed by test 1, test2, lab1, lab2, lab3, and lab4";
cin >> studentid >> firsttest >> secondtest >> lab1 >> lab2 >> lab3 >> lab4;
average = firsttest + secondtest + lab1 + lab2 + lab3 + lab4;
cout << average;
{
if (average >= 90 && <= 100)
cout << "You got an A average\n";
if (average >= 80 && <= 89.9)
cout << "You got an B average\n";
if (average >= 70 && <= 79.9)
cout << "You got an C average\n";
if (average >= 60 && <= 69.9)
cout << "You got an D average\n";
if (average >= 0 && <= 59.9)
cout << "You got an F average\n";

}
}
}
}

I need help calculating the final grades. Assume we have only 3 students in this class so build a loop into this program. Obtain the student id #, the first test grade, second test score and 4 lab assignment scores from the keyboard. Validate that the 2 test scores are between 0-100. In the main routine, calculate the average by adding the six scores together and then dividing the result by six. Call a function, taking with you the average, that will figure and print the letter grade

[deleted account xyzzy]

QUIT spamming with new posts for the same problem!

[againtry]

#include <iostream>
#include <cmath>
#include <iomanip>
using namespace std;
int main()
{
    unsigned
    studentid{},
    firsttest{},
    secondtest{},
    lab1{},
    lab2{},
    lab3{},
    lab4{};
    double average{};
    //{
    cout << "Enter student id, followed by test 1, test2, lab1, lab2, lab3, and lab4" << endl;
    cin >> studentid >> firsttest >> secondtest >> lab1 >> lab2 >> lab3 >> lab4;
    if (firsttest > 0 and  firsttest < 100 and secondtest > 0 and secondtest < 100)
    {
        //            cout << "Enter student id, followed by test 1, test2, lab1, lab2, lab3, and lab4";
        //            cin >> studentid >> firsttest >> secondtest >> lab1 >> lab2 >> lab3 >> lab4;
        average = (firsttest + secondtest + lab1 + lab2 + lab3 + lab4)/6.0;
        cout << average;
        //{
        if (average >= 90 && average <= 100)
            cout << "You got an A average\n";
        else if (average >= 80 && average <= 89.9)
            cout << "You got an B average\n";
        else if (average >= 70 && average <= 79.9)
            cout << "You got an C average\n";
        else if (average >= 60 && average <= 69.9)
            cout << "You got an D average\n";
        else if (average >= 0 && average <= 59.9)
            cout << "You got an F average\n";
    }
    else
    {
        cout << "Your test score must be a valid percentage score between 0 and 100";
    }
    
    return 0;
}

[LE8p216C]

Thanks man I'm picking up on it slowly but knew I was close is there a way to run a loop 3 times with that or just repaste the code part to ask 3 times?

[againtry]

Green tick your other thread on this first!

[LE8p216C]

Just did that sorry about that btw!

[againtry]

PS Why not try both ways of doing it - loop, or cut and paste?

[LE8p216C]

I did the copy and paste to use for three students its just very long and still learning on what command would ask it three times

[againtry]

What's wrong with a loop? Especially useful if you had, say, 1000 to enter.

for(int student_count = 0; student_count < 3; student_count++)
{
    // do the same stuff
    
    student_count++;
}

This would print out the results but doesn't store individual scores - how to do that comes later.


This time show us your code. Otherwise ... :(

[LE8p216C]

againtry solved that one I am almost done with my other one have one problem not sure how to fix this problem. I have it saying in program if stuff happens then mild = largest but im getting an error obviously cause largest isn't a value I want the program to know its the word "largest" value any idea?// Austin West 4/29/2020 This program is used to help a company keep track of their chips and salsa sales.
#include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main()
{
float
Mild,
Medium,
Sweet,
Hot,
Zesty,
Total,
Largest,
Smallest,
Average;
cout << "Enter the number of Mild salsa sold ";
cin >> Mild;
cout << "Enter the number of Medium salsa sold ";
cin >> Medium;
cout << "Enter the number of Sweet salsa sold ";
cin >> Sweet;
cout << "Enter the number of Hot salsa sold ";
cin >> Hot;
cout << "Enter the number of Zesty salsa sold ";
cin >> Zesty;
Total = Mild + Medium + Sweet + Hot + Zesty;
Average = Total / 5;
{
if (Mild > Medium || Sweet || Hot || Zesty);
cin >> (Mild = Largest);
if (Medium > Mild || Sweet || Hot || Zesty);
cin >> (Medium = Largest);
if (Sweet > Medium || Mild || Hot || Zesty);
cin >> (Sweet = Largest);
if (Hot > Medium || Sweet || Mild || Zesty);
cin >> (Hot = Largest);
if (Zesty > Medium || Sweet || Hot || Mild);
cin >> (Zesty = Largest);
{
if (Mild < Medium || Sweet || Hot || Zesty);
cin >> (Mild = Smallest);
if (Medium < Mild || Sweet || Hot || Zesty);
cin >> (Medium = Smallest);
if (Sweet < Medium || Mild || Hot || Zesty);
cin >> (Sweet = Smallest);
if (Hot < Medium || Sweet || Mild || Zesty);
cin >> (Hot = Smallest);
if (Zesty < Medium || Sweet || Hot || Mild);
cin >> (Zesty = Smallest);
cout << Total << Average << Largest << Smallest;
}
}
}

[againtry]

For a start, lines like the following do nothing other than perform the test, and nothing more because of the ';'

if (Hot < Medium || Sweet || Mild || Zesty);

[againtry]

Here's also a start on how to do this with functions.

You stiil need a function to check each input value, smallest and largest.

#include <iostream>
#include <iomanip>

using namespace std;

int total(int a, int b, int c, int d , int e)
{
    return a+b+c+d;
}

float average(int a, int b, int c, int d , int e)
{
    return total(a, b, c, d, e)/5.0;
}


int smallest(int a, int b, int c, int d , int e)
{
    // ???
    // return ???;
}

int largest(int a, int b, int c, int d , int e)
{
    // ???
    // return ???;
}

int main()
{
    int
    Mild,
    Medium,
    Sweet,
    Hot,
    Zesty;
    
    cout << "Enter the number of Mild salsa sold ";
    cin >> Mild;
    cout << "Enter the number of Medium salsa sold ";
    cin >> Medium;
    cout << "Enter the number of Sweet salsa sold ";
    cin >> Sweet;
    cout << "Enter the number of Hot salsa sold ";
    cin >> Hot;
    cout << "Enter the number of Zesty salsa sold ";
    cin >> Zesty;
    
    
    
    cout << "Total jars: " << total(Mild, Medium, Sweet, Hot, Zesty) << endl;
    cout << "Average jars: " << average(Mild, Medium, Sweet, Hot, Zesty) << endl;
    
    
    return 0;
}

Hint: to get the smallest number take the first as the smallest and if the next one is smaller then that one becomes the smallest then go through the series ...