Strcmp函数源码从VC库文件中提取

#include<cruntime.h>
#include<string.h>

#ifdef_MSC_VER
#pragmafunction(strcmp)
#endif

int __cdeclstrcmp (
const char* src,
const char* dst
)
{
int ret =0 ;

while( !(ret = *(unsigned char *)src - *(unsigned char *)dst)&& *dst)
++src, ++dst;

if ( ret< 0 )
ret = -1 ;
else if (ret > 0 )
ret = 1 ;

return(ret );
}