在此代码中如何避免截断整数除法?我排序的数组是1 1 1 1 1 1
,所以a [0] = 1和a [n]应该是1/2 = 0.5。截断整数除法
int main()
{
long long n,w;
scanf("%lld %lld", &n, &w);
long long arr[2*n];
for(long long i = 0; i < 2 * n; i++)
{
scanf("%lld", &arr[i]);
}
sort(arr,arr+2*n);
long long a = arr[0];
long long b = (float)(arr[n]/2); // <--- this part of code
cout << " a is " << a << endl;
cout << " b is " << b << endl;
long long m = min(a,b);
cout << " m is " << m << endl;
long long and = min(m * n + m * 2LL * n, w);
printf("%lld", ans);
return 0;
}
C或C++?他们是不同的语言。 –
该帖子无效C代码。 – chux
将'long long'转换为'float'对于大数值肯定会失去精度。 – chux