[c lang] 복소수 사칙연산

	/*
	how to compile
	C99 표준
	hacker@rust:~/clang$ gcc -o c1 c1.c
	hacker@rust:~/clang$ ./c1
	c1: 2.0 + 3.0i
	c2: 4.0 + -2.0i
	Sum: 6.0 + 1.0i
	Difference: -2.0 + 5.0i
	Product: 14.0 + 8.0i
	Division: 0.1 + 0.8i
	*/
	#include <stdio.h>
	#include <complex.h>
	int main() {
	// 복소수 생성
	double complex c1 = 2.0 + 3.0 * I;
	double complex c2 = 4.0 - 2.0 * I;
	// 복소수 사칙연산
	double complex sum = c1 + c2;
	double complex difference = c1 - c2;
	double complex product = c1 * c2;
	double complex division = c1 / c2;
	// 복소수 출력
	printf("c1: %.1f + %.1fi\n", creal(c1), cimag(c1));
	printf("c2: %.1f + %.1fi\n", creal(c2), cimag(c2));
	printf("Sum: %.1f + %.1fi\n", creal(sum), cimag(sum));
	printf("Difference: %.1f + %.1fi\n", creal(difference), cimag(difference));
	printf("Product: %.1f + %.1fi\n", creal(product), cimag(product));
	printf("Division: %.1f + %.1fi\n", creal(division), cimag(division));
	return 0;
	}

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