Submission #112545

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Source Code Expand

#include<stdio.h>

	int main(){
		int i,j;
		double x[3],y[3];
		double s;

		for(i=0;i<3;i++)
		scanf("%lf %lf",&x[i],&y[i]);

		for(i=1;i<3;i++){
		x[i]-=x[0];
		y[i]-=y[0];
		}

		s=(x[1]*y[2]-y[1]*x[2])/2;
		s=abs(s);


		printf("%f\n",abs);


		return 0;
	}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:20:3: warning: format ‘%f’ expects argument of type ‘double’, but argument 2 has type ‘__attribute__((const)) int (*)()’ [-Wformat]
./Main.c:9:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result