ex3_2.c

//- 섭씨화씨 교재 예제
//getchar()대신 %*c를 썼을때
#define _CRT_SECURE_NO_WARNINGS
#include <stdio.h>

double convert_celsiu_fahrenheit(double x);
double convert_fahrenheit_celsiu(double y);

double convert_celsiu_fahrenheit(double x){
	double h;
	h = 9.0 / 5.0 * x + 32;
	return h;
}

double convert_fahrenheit_celsiu(double y){
	double s;
	s = (y - 32.0) * 5.0 / 9.0;
	return s;
}

int main(void) {
	char command;
	double fahrenheit;
	double celsius;

	while (1) { //무한반복루트  wihle(1)
		printf("=====================================\n");
		printf("'c' 섭씨온도에서 화씨 온도로 변환\n");
		printf("'f' 화씨온도에서 섭씨 온도로 변환\n");
		printf("'q' 종료\n");
		printf("=====================================\n");
		printf("메뉴에서 선택하세요: ");
		scanf("%c%*c", &command);

		if (command == 'c') {
			printf("섭씨온도:");
			scanf("%lf%*c", &celsius);
			fahrenheit = convert_celsiu_fahrenheit(celsius);
			printf("화씨온도:%lf\n", fahrenheit);
		}
		else if (command == 'f') {
			printf("화씨온도:");
			scanf("%lf%*c", &fahrenheit);
			celsius = convert_fahrenheit_celsiu(fahrenheit);
			printf("섭씨온도:%lf\n", celsius);
		}
		else if (command == 'q') {
			break;
		}
		else {
			printf("다시 입력하세요.\n");
		}

	}
	return 0;
}