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Напимер так
typedef struct{
unsigned char ReadPos;
unsigned char WritePos;
unsigned char Counter;
char Buf[8];
}c_buf;
c_buf CBuf={0,0,0,""};
char ReadCBuf(c_buf* buffer, char *ch)
{
if(buffer->Counter == 0)return 0;
*ch = buffer->Buf[buffer->ReadPos];
buffer->Counter--;
if((++buffer->ReadPos) == 8)buffer->ReadPos=0;
return 1;
}
char WriteCBuf(c_buf* buffer, char ch)
{
if(buffer->Counter == 8)return 0;
buffer->Buf[buffer->WritePos] = ch;
buffer->Counter++;
if((++buffer->WritePos) == 8)buffer->WritePos=0;
return 1;
}
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