以下代码仅将前7个字节正确保存到文件中,剩余的3072-7 = 3065个字节不正确。 "正确"表示存储在'数据'中的相同值。
#define byte unsigned char
void bytesToImage(byte width, byte height, byte* data, size_t byte_count, char* fileNameWithoutExtension)
{
{
std::ofstream file("k3000", std::ios::binary);
file.write((char *)data, 3000);
}
}
但是,此代码确实正确保存了前500个字节:
#define byte unsigned char
void bytesToImage(byte width, byte height, byte* data, size_t byte_count, char* fileNameWithoutExtension)
{
{
std::ofstream file("k500", std::ios::binary);
file.write((char *)data, 500);
}
}
data
的长度为3072,函数调用如下:
size_t imageByteCount = 32 * 32 * 3;
byte* imageBufferOut = (byte*)malloc(sizeof(byte) * imageByteCount);
//(imageBufferOut is initialized...)
bytesToImage(32, 32, imageBufferOut, imageByteCount, "img");
请原谅冗余参数,我已经删除了尽可能多的尝试找到错误。
答案 0 :(得分:1)
尝试添加更多的工具。例如:
{
cout << "before:";
for (int i = 0; i < 16; ++i)
cout << ' ' << std::hex << int(data[i]);
cout << '\n';
std::ofstream file("k3000", std::ios::binary);
if (file)
cout << "opened\n";
else
cout << "couldn't open\n";
file.write((char *)data, 3000);
file.flush();
if (file)
cout << "wrote ok\n";
else
cout << "write failed\n";
cout << "after:";
for (int i = 0; i < 16; ++i)
cout << ' ' << std::hex << int(data[i]);
cout << '\n';
}