Help with this small C program

[Havax]

Hi, I am new to C, but I want to get ahead of the game before I go to school and out into the workplace. I tried coming up with a general program that calculates an average grade. I am a beginner at this and any help would be greatly appriceated!

#include
int main ()

{
int hw1, hw2, hw3, hwtotal;
int proj1, proj2, proj3, proj4, projtotal;
int exam1, exam2, exam3, examtotal;
float grade;

/* Get user input scores */

printf("Enter the homework 1 score: \n");
scanf("%d, &hw1);
printf("Enter the homework 2 score: \n");
scanf("%d, &hw2);
printf("Enter the homework 3 score: \n");
scanf("%d, &hw3);
printf("Enter the project 1 score: \n");
scanf("%d, &proj1);
printf("Enter the project 2 score: \n");
scanf("%d, &proj2);
printf("Enter the project 3 score: \n");
scanf("%d, &proj3);
printf("Enter the project 4 score: \n");
scanf("%d, &proj4);
printf("Enter the exam 1 score: \n");
scanf("%d, &exam1);
printf("Enter the exam 2 score: \n");
scanf("%d, &exam2);
printf("Enter the exam 3 score: \n");
scanf("%d, &exam3);

/* Calculate the grades */

hwtotal=hw1+hw2+hw3;
projtotal=proj1+proj2+proj3+proj4;
examtotal=exam1+exam2+exam3;
grade=++]*100;

/* Shows the user their grade */

if (grade=90)
{
printf("With an average of %f, your course grade is an A.\n", grade);
}

return 0;
}

proj1.c: In function `main':
proj1.c:13: error: missing terminating " character
proj1.c:14: error: parse error before ';' token
proj1.c:15: error: missing terminating " character
proj1.c:17: error: missing terminating " character
proj1.c:18: error: parse error before ';' token
proj1.c:19: error: missing terminating " character
proj1.c:21: error: missing terminating " character
proj1.c:22: error: parse error before ';' token
proj1.c:23: error: missing terminating " character
proj1.c:25: error: missing terminating " character
proj1.c:26: error: parse error before ';' token
proj1.c:27: error: missing terminating " character
proj1.c:29: error: missing terminating " character
proj1.c:30: error: parse error before ';' token
proj1.c:31: error: missing terminating " character
proj1.c:38: error: parse error before '[' token
proj1.c:5: warning: unused variable `hw1'
proj1.c:5: warning: unused variable `hw2'
proj1.c:5: warning: unused variable `hw3'
proj1.c:5: warning: unused variable `hwtotal'
proj1.c: At top level:

Are my logistics wrong? Please help me out with the various fixes.

[cwr]

Your #include is missing the file:

#include <stdio.h>

All your scanf functions are missing the second quote:

scanf("%d", &hw1);

What do you mean here? It doesn't make sense:

grade=++]*100;

In C, you use = for assignment, and == for comparison:

if (grade=90)

[Havax]

I ended up fixing the errors:

#include <stdio.h>
int main ()

{
   int hw1, hw2, hw3, hwtotal;
   int proj1, proj2, proj3, proj4, projtotal;
   int exam1, exam2, exam3, examtotal;
   float grade;

   /* Get user input scores */

   printf("Enter the homework 1 score: \n");
   scanf("%d", &hw1);
   printf("Enter the homework 2 score: \n");
   scanf("%d", &hw2);
   printf("Enter the homework 3 score: \n");
   scanf("%d", &hw3);
   printf("Enter the project 1 score: \n");
   scanf("%d", &proj1);
   printf("Enter the project 2 score: \n");
   scanf("%d", &proj2);
   printf("Enter the project 3 score: \n");
   scanf("%d", &proj3);
   printf("Enter the project 4 score: \n");
   scanf("%d", &proj4);
   printf("Enter the exam 1 score: \n");
   scanf("%d", &exam1);
   printf("Enter the exam 2 score: \n");
   scanf("%d", &exam2);
   printf("Enter the exam 3 score: \n");
   scanf("%d", &exam3);

   /* Calculate the grades */

   hwtotal=hw1+hw2+hw3;
   projtotal=proj1+proj2+proj3+proj4;
   examtotal=exam1+exam2+exam3;
   grade=(hwtotal/300)*.12+(projtotal/400)*.28+(examtotal/300)*.6*100;

/* Shows the user their grade */

      if (grade<=60)
      {
         printf("With an average of %f, your course grade is an F.\n", grade);
      }
      else if (grade<70)
        {
           printf("With an average of %f, your course grade is a D.\n", grade);
        }
      else if (grade<80)
      {
         printf("With an average of %f, your course grade is a C.\n", grade);
      }
      else if (grade<90)
      {
         printf("With an average of %f, your course grade is a B.\n", grade);
      }
      else if (grade>=90)
      {
         printf("With an average of %f, your course grade is an A.\n", grade);
      }

return 0;
}

But when I execute the program no matter what grades I enter, it always comes out 0.00000 and F. Why is this? What can I do to fix that?

[cwr]

grade=(hwtotal/300)*.12+(projtotal/400)*.28+(examtotal/300)*.6*100;

Because hwtotal, projtotal and examtotal are integers, and because 300, 400, and 300 are integers, the compiler is treating the expression as integer. Change them to 300.0, 400.0, 300.0 so it knows to use floating point.

Also, watch out for operator precedence. The *100 will only affect the (examtotal/300)*.6, but you want to to affect the whole expression.

[DoctorFu]

Havax, do you live in MD? I have a similar assignment in school and that'd be interesting if we had the same class..