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stef_ios

Wed Jan 23, 2008 4:06 pm


program using nested ifs

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Hey all! So I am working on a C program that uses nested ifs. It asks the user to input four marks and based on the marks, it will calculate what the mark should be, and then display a grade level. 

a)All the marks are out of 100, and are equally weighted in the average.
b)Grades are assigned based on A = 80 ? 100, B = 70 ? 79, C = 60 ? 69, D = 50 ? 59, F = 0 ? 49
c)If the student fails (i.e. mark < 50) either or both assignments, the grade is reduced by 1 (e.g. B becomes C).
d)If the student fails either or both tests, the mark will be F.

So I have done the program. I am having a problem with part c) though. Here is my program (done in Quincy99):


#include 
#include 

int
main(void)

{

	double test1, test2, assignment1, assignment2;

	printf("Please enter the first test mark: ");      
	scanf("%f", &test1);
	printf("You entered: %f \n", test1);"

	printf("Please enter the second test mark: ");      
	scanf("%f", &test2);
	printf("You entered: %f \n",test2);

	printf("Please enter the first assignment mark: ");      
	scanf("%f", &assignment1);
	printf("You entered: %f \n", assignment1);

	printf("Please enter the second assignment mark: ");      
	scanf("%f", &assignment2);
	printf("You entered: %f \n", assignment2);

/* Now using nested ifs the program will use the calculate the average of the entered numbers and will
   determine what the final mark is for the student */
	
	if ((test1+test2+assignment1+assignment2)/4 == '100>80')
                     printf ("You got an A! \n");
    
	else
                   if ((test1+test2+assignment1+assignment2)/4 == '79>70') 
                      printf ("You got a B! \n");
      
	  else
                      if ((test1+test2+assignment1+assignment2)/4 == '69>60') 
                            printf ("You got a C! \n");
		
		else
                                    if ((test1+test2+assignment1+assignment2)/4 == '59>50') 
                                       printf ("You got a D! \n");
			
			else
          	                                 if ((test1+test2+assignment1+assignment2)/4 == '49>0') 
             	                                       printf ("You got an F! \n");

				else
      		                                  if (test1,test2 == '50>0') 
          			                     printf ("You got an F! \n");
					
					else
      				                    if ((assignment1, assignment2) == '50>0') 
                    	                                                        printf ("You got a  ! \n");
          			
					else
             		                                                   printf ("INVALID MARK! \n");
 
   return (0);

}


So i'm not sure how to do part c) and also, how can I get my program to make sure none of the numbers inputed by the user are greater than 100 (100 is the maximum number that can be entered). Any help I can get would be great! Thanks! :D