Functions Error

This program I wrote has an error. It would be nice if someone can trace the error in this.


Write a complete C Program that will either display [1]Area of the Circle OR [2]Area of the Square OR [3] Area of the Triangle. Use a function for each computation or task.

Code:

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


void main()
void aCircle()
void aSquare()
void aTriangle()


{
	int rad, side, base, height, choice;
	float A;
	printf("[1]Area of the Circle\n");
	printf("[2]Area of the Square\n");
	printf("[3]Area of the Triangle\n");
	scanf("%d", &choice);

	switch(choice)
	{
		case 1: aCircle();
					break;
		case 2: aSquare();
					break;
		case 3: aTriangle();
					break;
		default: printf("Invalid Choice");
	}

		void aCircle()
		{
		int rad;
		float A;
		printf("Enter Radius of the Circle\n");
		scanf("%d", &rad);
		A=3.1416*rad*rad;
		printf("Area of the Circle is %f", A);
		}

		void aSquare()
		{
			int side;
			float A;
			printf("Enter the Side of the Square\n");
			scanf("%d", &side);
			A=side*side;
			printf("Area of the Square is %f", A);
		}

		void aTriangle()
		{
			int base, height;
			float A;
			printf("Enter the Base and Height\n");
			scanf("%d %d", &base, &height);
			A=(base*height)/2.0;
			printf("Area of the Triangle %f", A);
		}
}

Where's int main()?

What are those undefined curly braces around everything?

Why are your functions nested in them?

Originally Posted by jhunluis

This program I wrote has an error. It would be nice if someone can trace the error in this.


Write a complete C Program that will either display [1]Area of the Circle OR [2]Area of the Square OR [3] Area of the Triangle. Use a function for each computation or task.

Code:

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


void main()
void aCircle()
void aSquare()
void aTriangle()


{
	int rad, side, base, height, choice;
	float A;
	printf("[1]Area of the Circle\n");
	printf("[2]Area of the Square\n");
	printf("[3]Area of the Triangle\n");
	scanf("%d", &choice);

	switch(choice)
	{
		case 1: aCircle();
					break;
		case 2: aSquare();
					break;
		case 3: aTriangle();
					break;
		default: printf("Invalid Choice");
	}

		void aCircle()
		{
		int rad;
		float A;
		printf("Enter Radius of the Circle\n");
		scanf("%d", &rad);
		A=3.1416*rad*rad;
		printf("Area of the Circle is %f", A);
		}

		void aSquare()
		{
			int side;
			float A;
			printf("Enter the Side of the Square\n");
			scanf("%d", &side);
			A=side*side;
			printf("Area of the Square is %f", A);
		}

		void aTriangle()
		{
			int base, height;
			float A;
			printf("Enter the Base and Height\n");
			scanf("%d %d", &base, &height);
			A=(base*height)/2.0;
			printf("Area of the Triangle %f", A);
		}
}

The prototype declaration should be done before main(). main() should properly return 0 at the end, by properly I mean it should have proper curly braces. Post a corrected piece of code.

The prototypes should also have a ; at the end of each one. In the future, try actually including the error messages you get.


Quzah.

Go back to your book and read it. That's not even close.

Yep, a quick fix really isn't in order here - you just need to study the language a bit more.