need sum help with a function please!!

[james_4456]

OK, i am very new to programming as a whole infact i have only been doing it for a couple of months i am generally getting on ok with it,altho frustrating at time but i am stuck on something that i have to do for college. I have written a program that calculates two exam results and gives out a total mark and converts the total marks to a grade from A - F, however i have not put it into fuctions. i have tried and tried to separate my programme into functions but i cant seem to get it to work can anybody give me some assistance.

#include <stdio.h>
#include <conio.h>
int main(void)
{
	int examMark;
	int assignMark;
	int totalMark;
	char grade;
	
	{
	printf("\nEnter exam mark out of 50: ");
	scanf("%d", &examMark);
	printf("\nEnter assignment mark out of 50: ");
	scanf("%d", &assignMark);

	totalMark = examMark + assignMark;
	if (totalMark >= 39) 
	{
		if ((examMark <15) || (assignMark < 15))
		{
			totalMark = 39;
		}
		else
		{
			if (totalMark == 39)
			{
				totalMark = 40;
			}
		}
	}
	if (totalMark >=70)
	{
		grade = 'A';
	}
	else
	{
		if (totalMark >=60)
		{
			grade = 'B';
		}
		else
		{
			if (totalMark >= 50)
			{
				grade = 'C';
			}
			else
			{
				if (totalMark >= 40)
				{
					grade = 'D';
				}
				else
				{
					grade = 'F';
				}
			}
		}
	}
	printf("\nExam : %d/50  Assignment : %d/50  Grade : %c\n\n", examMark, assignMark, grade);
	
	} 

	return 0;
}

any help at all would be much appriciated, cheers james

[Salem]

Well you basically look for blocks of code which seem to do a specific task.

So taking the bit of code which calculates the total...

#include <stdio.h>
#include <conio.h>
int main(void)
{
	int examMark;
	int assignMark;
	int totalMark;
	char grade;
	
	{
	printf("\nEnter exam mark out of 50: ");
	scanf("%d", &examMark);
	printf("\nEnter assignment mark out of 50: ");
	scanf("%d", &assignMark);


	totalMark = examMark + assignMark;
	if (totalMark >= 39) 
	{
		if ((examMark <15) || (assignMark < 15))
		{
			totalMark = 39;
		}
		else
		{
			if (totalMark == 39)
			{
				totalMark = 40;
			}
		}
	}

	if (totalMark >=70)
	{
		grade = 'A';
	}
	else
	{
		if (totalMark >=60)
		{
			grade = 'B';
		}
		else
		{
			if (totalMark >= 50)
			{
				grade = 'C';
			}
			else
			{
				if (totalMark >= 40)
				{
					grade = 'D';
				}
				else
				{
					grade = 'F';
				}
			}
		}
	}
	printf("\nExam : %d/50  Assignment : %d/50  Grade : %c\n\n", examMark, assignMark, grade);
	
	} 

	return 0;
}

Would be something like this

#include <stdio.h>
#include <conio.h>

int calculateTotal ( int examMark, int assignMark );

int main(void)
{
	int examMark;
	int assignMark;
	int totalMark;
	char grade;
	
	{
	printf("\nEnter exam mark out of 50: ");
	scanf("%d", &examMark);
	printf("\nEnter assignment mark out of 50: ");
	scanf("%d", &assignMark);


	totalMark = calculateTotal( examMark, assignMark );

	if (totalMark >=70)
	{
		grade = 'A';
	}
	else
	{
		if (totalMark >=60)
		{
			grade = 'B';
		}
		else
		{
			if (totalMark >= 50)
			{
				grade = 'C';
			}
			else
			{
				if (totalMark >= 40)
				{
					grade = 'D';
				}
				else
				{
					grade = 'F';
				}
			}
		}
	}
	printf("\nExam : %d/50  Assignment : %d/50  Grade : %c\n\n", examMark, assignMark, grade);
	
	} 

	return 0;
}

int calculateTotal ( int examMark, int assignMark ) {
	int totalMark = examMark + assignMark;
	if (totalMark >= 39) 
	{
		if ((examMark <15) || (assignMark < 15))
		{
			totalMark = 39;
		}
		else
		{
			if (totalMark == 39)
			{
				totalMark = 40;
			}
		}
	}
	return totalMark;
}

[vart]

For example this part

if (totalMark >=70)
	{
		grade = 'A';
	}
	else
	{
		if (totalMark >=60)
		{
			grade = 'B';
		}
		else
		{
			if (totalMark >= 50)
			{
				grade = 'C';
			}
			else
			{
				if (totalMark >= 40)
				{
					grade = 'D';
				}
				else
				{
					grade = 'F';
				}
			}
		}
	}

can be easely converted to function

char getGradeFromMark(int totalMark)
{
   if (totalMark >=70)
   {
	return 'A';
   }
   if (totalMark >=60)
   {
	return 'B';
   }
   if (totalMark >= 50)
   {
	return 'C';
   }
   if (totalMark >= 40)
   {
	return 'D';
   }
   return 'F';
}

Also you can create functions for entering scores, for calculating totalMark and for outputting resulting Grade
[edit]
It took me too long

[Salem]

Heh - I guess he's got all he needs now that we've done one each

[james_4456]

Thanx a lot i will go and give it a go and see if i can get it to work, much apprieciated, cheers again

james

[james_4456]

Yeah it works like a charm....and wats more i actually understand what uve done which is always helpful for future programs cheers guys