c++ - Matlabs `fread(fp, 1, ' int3 2')`和fread(fp，n， 'uchar')的C++翻译是什么

所以我尝试将这样的Matlab代码转换为C++:

ss = 'file.mask'
fp = fopen(ss, 'rb');
sx = fread(fp,  1, 'int32')
sy = fread(fp,  1, 'int32')
mask = zeros(sy, sx);
mm = mask(100, 100:200);
count = zeros(10, 1);
for i = 1:sy
    row = fread(fp,  sx, 'uchar');
    for j = 1:sx
        for k = 1:10
            if row(j) == k - 1
                count(k) = count(k) + 1;
            end
        end
    end
    mask(i, :) = row;
end
fclose(fp);

所以我想知道Matlab fread的C++模拟是什么吗？

最佳答案

如果您真的想要C++模拟而不是C模拟(甚至是C / C++模拟)，那么您应该使用std::ifstream:

std::ifstream in("file.mask", std::ios_base::in | std::ios_base::binary);

int sx, sy;
in.read(reinterpret_cast<char*>(&sx), sizeof(int));
in.read(reinterpret_cast<char*>(&sy), sizeof(int));
std::vector<unsigned char> row(sx);

for(...)
{
    ...
    in.read(reinterpret_cast<char*>(&row[0]), sx);
    ...
}