C/C ++ analyze and explain common problems

C/C ++ analyze and explain common problems

Summarize the problems encountered in using C/C ++ and analyze them:

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

Code:

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 ;}

When the sprintf_s function is called, the buffer size does not match:

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