Lawes的技术专栏

void bitcount(int x) {  printf("%d ",x);  int i = 0;  while(x)  {    x &= x-1;    i++;  }      printf("%d\n",i); } void bitcount2(int x) {  printf("%d ",x);  int i = 0;  while(x)  {

#include #include #include union ArrayType { int *d; double *lf; char *c;};enum DATATYPE { CHAR = 'c', DOUBLE = 'l', INT = 'd'};struct ArrayType2 { enum DATATYPE flag; union { int *d; double *lf; char

#include #define printX(x, n) _Generic((x), \ double *: print_double, \ int *: print_int)(x, n)void print_double(double arr[], int n){ for (int i = 0; i < n; ++i) printf("double %lf\n", arr[i]);}void