itoa 用法
http://www.cplusplus.com/reference/cstdlib/itoa/
sprintf 用法
http://www.cplusplus.com/reference/cstdio/sprintf/?kw=sprintf
使用sprintf 替代itoa
char pcBuffer[4];
int nBuffer = 0;
itoa( nBuffer, pcBuffer, 10 );
sprintf( pcBuffer, "%d", nBuffer);
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