Thread: Need help with my C code

I wrote this code, but when I want to print the average at the end, all it says is 0.00.
What am I doing wrong?

Code:

#include <stdio.h>

char first, last;
int test_one, test_two, test_three;
int test_one_score, test_two_score, test_three_score;
int averageGrade;

int main()
{
    //Get the maximum scores.
    printf("Please enter the maximum score possible for test one: ");
    scanf("%d", &test_one);

    printf("Please enter the maximum score possible for test two: ");
    scanf("%d", &test_two);

    printf("Please enter the maximum score possible for test three: ");
    scanf("%d", &test_three);


    //Get students name.
    printf("\nEnter your first and last name initials: ");
    scanf(" %c%c", &first, &last);


    //Get student test grades.
    printf("\n\nEnter your test one score: ");
    scanf("%d", &test_one_score);

    printf("Enter your test two score: ");
    scanf("%d", &test_two_score);

    printf("Enter your test three score: ");
    scanf("%d", &test_three_score);


    //Calculate average grade.
    averageGrade = (test_one_score + test_two_score + test_three_score)/(test_one + test_two + test_three) * 100;


    //Output student's info.
    printf("\nStudent's initials: %c%c", first, last);
    printf("\nAverage Score: %d\n", averageGrade);


    return (0);
}

Use floats in place of integers:

Why your code is not working is :

Code:

averageGrade = (test_one_score + test_two_score + test_three_score)/(test_one + test_two + test_three) * 100;

An integer divided by an integer should give an integer - the fractional part of the result is ignored a problem which you can solve by 1) casting to float before dividing 2) using floats in your whole program.

I changed all my variables to floats and now the average is coming out properly. Thanks.
Is this fine or should I not be using floats for everything?

The type that should be used depends on the data your working with, so here turning all the grade variables into floats is fine.