在C++中優化字符數組成員交換

Question

char buffer[256]; 

for(int x = 0; x<256; x+=4) 
{ 
char one = buffer[x]; 
char two = buffer[x+1]; 
char three = buffer[x+2]; 
char four = buffer[x+3]; 

buffer[x] = four; 
buffer[x+1]=three; 
buffer[x+2]= two; 
buffer[x+3]=one; 
} 

我該如何優化它？

Answer 1

使用std::reverse：

std::reverse(&buffer[x], &buffer[x + 4]);