相关疑难解决方法(0)

float a = 0;
while (true)
{
    a++;
    if (a > 16777216)
        break; // Will never break... a stops at 16777216
}

任何人都可以向我解释为什么浮点值在此代码中停止递增16777216？

编辑:

或者更简单:

float a = 16777217; // a becomes 16777216

I would like to make some vector computation faster, and I believe that SIMD instructions for float comparison and manipulation could help, here is the operation:

void func(const double* left, const double* right, double* res, const size_t size, const double th, const double drop) {
        for (size_t i = 0; i < size; ++i) {
            res[i] = right[i] >= th ? left[i] : (left[i] - drop) ;
        }
    }

Mainly, it drops the left value by drop in case right …