complex.c

C源码集

#include <stdio.h>

	struct complex
	{
		float real;
		float imag;
	};
// define structure outside main in pre=processor area to make
// it global. Otherwise functions will not know about it

struct complex add(struct complex first, struct complex second);

int main ()
{

	struct complex num1 = {1.7, 3.4}, num2, ans;
	num2.real = 5.1;
	num2.imag = 2.3;
	// or scanf("%f %f", num2.real, num2.imag);

	ans = add(num1, num2);
	printf("(%5.2f, %5.2f) + (%5.2f, %5.2f) is (%5.2f, %5.2f)\n",
				num1.real, num1.imag, num2.real, num2.imag, ans.real, ans.imag);

	return 0;
}

struct complex add (struct complex first, struct complex second)
{
	struct complex result;
	result.real = first.real + second.real;
	result.imag = first.imag + second.imag;

	/* Identical result, less typing:

		struct complex result = first;
		result.real += second.real;
		result.imag += second.imag; */

	return result;
}