Getting the following error: error C2059: syntax error : '=', can anyone help?

I am trying to define values for the variables "area" and "circ" but everytime I try to build the project I get this error:

Code:

error C2059: syntax error : '='

Here is the code in question:

Code:

#include<stdio.h>
#include<math.h>
#define PI = 3.14159 

int main()
{
	int var1, two = 2;
	double radius, area, circ;
	
	printf("Program: Arithmetic Expressions\nAuthor: Stephen Haroldson\nEnter unsigned short int: ");
	scanf("%d", &var1);
	printf("The value of %d raised to the %d power is %f\n", two, var1, pow(two, var1));
	printf("Enter unsigned short int: ");
	scanf("%1f", &radius);

	area = PI * radius * radius;
	circ = 2 * PI * radius;

	printf("A circle with a radius %d has a circumference of %f and an area of %f\n", radius, circ, area);
        return 0;
}

If anyone can give me any suggestions I would appreciate it greatly. Thanks.

A macro definition is not a normal assignment, hence this:

Code:

#define PI = 3.14159

should be:

Code:

#define PI 3.14159

Also check your types in your printf statements. %d and %lf do not go with doubles.

may be #define with no need for "="

Ah, I see. Thanks for the information. I knew it had to do something with the preprocessor statements.