if (memcmp(OK,buffer,4)!=0) 新手求教育
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if (memcmp(OK,buffer,4)!=0) 新手求教育
![if (memcmp(OK,buffer,4)!=0) 新手求教育](/uploads/image/z/15094378-10-8.jpg?t=if+%28memcmp%28OK%2Cbuffer%2C4%29%21%3D0%29+%E6%96%B0%E6%89%8B%E6%B1%82%E6%95%99%E8%82%B2)
#include int memcmp( const void *buffer1,const void *buffer2,size_t count );
功能:函数比较buffer1和buffer2的前count个字符.返回值如下:
Value
less than 0
buffer1 is less than buffer2
equal to 0
buffer1 is equal to buffer2
greater than 0
buffer1 is greater than buffer2
功能:函数比较buffer1和buffer2的前count个字符.返回值如下:
Value
less than 0
buffer1 is less than buffer2
equal to 0
buffer1 is equal to buffer2
greater than 0
buffer1 is greater than buffer2