调试断言失败，C ++向量下标超出范围

Question

I know this question has been asked before but even after looking at all the others I can't seem to figure this out. I am getting "vector subscript out of range" for the following code:

double forward_price(int number_divs, std::vector<double> *dividends, std::vector<double> *time_dividends)
{
    int i = number_divs - 1;
    for (; i >= 0 & (*time_dividends)[i] > 0.0;)
        i--;

    for (; i >= 0 & (*time_dividends)[i] > 0.0; i--)
    {
        forward_px -= (*dividends)[i]
    }

    return forward_px;

}

int number_divs = 3;
std::vector<double> dividends = { .5, .6, .58 };
std::vector<double> time_dividends = { .04, .198, .6 };

double forward_div = forward_price(3, &dividends, &time_dividends);

As far as I can tell it is coming from the second for statement and works when I change that one to i>=1. I'm able to call time_dividends[0] and dividends[0] so I can't tell why this isn't working.

Answer 1

The single & in

i >= 0 & (*time_dividends)[i] > yte_forward

is a "bitwise and" , you probably want the "logical and" && .