Submission #23610

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Source Code Expand

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

typedef struct Pos2D
{
	int x;
	int y;
}Pos2D;

int GetLengthPow2( const Pos2D *a, const Pos2D *b )
{
	return (a->x - b->x) * (a->x - b->x) + (a->y - b->y) * (a->y - b->y);
}

int main( int argc, const char *argv[] )
{
	int num = 0, i, j;
	Pos2D *posArray = NULL;
	int maxLenPow2 = 0, lenPow2;
	double maxLen = 0.0;

	scanf( "%d", &num );
	posArray = (Pos2D*)malloc( num * sizeof(Pos2D) );

	for( i = 0; i < num; ++i )
		scanf( "%d %d", &posArray[i].x, &posArray[i].y );

	for( i = 0; i < num - 1; ++i )
	{
		for( j = i + 1; j < num; ++j )
		{
			lenPow2 = GetLengthPow2( &posArray[i], &posArray[j] );
			if( lenPow2 > maxLenPow2 )
				maxLenPow2 = lenPow2;
		}
	}

	maxLen = sqrt( (double)maxLenPow2 );
	printf( "%f\n", maxLen );

	free( posArray );
	return 0;
}

Submission Info

Compile Error

./Main.c: In function ‘main’:
./Main.c:23: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result
./Main.c:27: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result

Judge Result