C/C++常见的问题分析讲解

总结使用C/C++遇到的问题及分析：

1.Run-Time Check Failure #2 - Stack around the variable 'hex' was corrupted.

代码：

char bin[64] = "\x10\x5A\xFF";
char hex[64] = {0};
Bin2Hex(hex, sizeof(hex), bin, 3);

DWORD WINAPI Bin2Hex(LPSTR pHex, DWORD dwBufLen, LPCSTR pBin, DWORD dwLen)
{
	DWORD dwNowLen = 0;
	if(NULL == pHex || NULL == pBin)
	{
		return 0;
	}

	for(DWORD i = 0; i < dwLen; i++)
	{
		dwNowLen += 2;
		sprintf_s(pHex + i * 2, dwBufLen, "%02X", (BYTE) *(pBin + i));
	}

	return dwNowLen;
}

调用sprintf_s函数，缓冲区大小不匹配所导致，改为：

sprintf_s(pHex + i * 2, dwBufLen - i * 2, "%02X", (BYTE) *(pBin + i));