c中的整数数组中的二进制整数

Question

我有一个变量unsigned int x = 0b0011我怎样才能使它成为无符号整数数组，如y[0]=0 ; y[1]=0; y[2]=1; y[3]=1;？

Answer 1

移位和按位操作。

unsigned x = 0b0011; // yap this is a GNU extension, it doesn't always work even with GCC 

const size_t intsize = sizeof(x) * CHAR_BIT; // go go indepency-of-sizeof(int)! 

unsigned bits[intsize]; // that's why we love constexprs 

int i, j; 
for (i = intsize - 1, j = 0; i >= 0; i--, j++) { // and the comma operator too 
    bits[j] = (x >> i) & 0x1; 
}