Submission #2346873

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Source Code Expand

#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;

double p,pos[5][2];
double b[5],ans;

double dis(int s,int t){
	double x=pos[s][1]-pos[t][1];
	double y=pos[s][2]-pos[t][2];
	return sqrt(x*x+y*y);
}

int main()
{
	for(int i=1;i<=3;i++){
		scanf("%lf%lf",&pos[i][1],&pos[i][2]);
	}
	b[1]=dis(1,2);
	b[2]=dis(1,3);
	b[3]=dis(2,3);
	p=(b[1]+b[2]+b[3])/2;
	
	//printf("%.2lf %.2lf %.2lf %.2lf\n",b[1],b[2],b[3],p); 
	
	ans=sqrt(p*(p-b[1])*(p-b[2])*(p-b[3]));
	
	printf("%.1f",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:18:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lf%lf",&pos[i][1],&pos[i][2]);
                                        ^

Judge Result