ZOJ 1241 : Geometry Made Simple

zoj_1241.c

#include <stdio.h>
#include <math.h>

int a, b, c, count = 1;
double result;

int main() {
	scanf("%d %d %d", &a, &b, &c);
	while (a != 0 && b != 0 && c != 0) {
		if (c == -1) {
			printf("Triangle #%d\nc = %.3lf\n\n", count, sqrt((double)(a*a + b*b)));
		} else if (a == -1) {
			result = (double)(c*c - b*b);
			if (result < 0)
				printf("Triangle #%d\nImpossible.\n\n", count);
			else
				printf("Triangle #%d\na = %.3lf\n\n", count, sqrt(result));
		} else {
			result = (double)(c*c - a*a);
			if (result < 0)
				printf("Triangle #%d\nImpossible.\n\n", count);
			else
				printf("Triangle #%d\nb = %.3lf\n\n", count, sqrt(result));
		}
		count++;
		scanf("%d %d %d", &a, &b, &c);
	}
return 0;
}