c 参数传递都是值传递

1 #include <stdio.h>
  2
  3 struct coo
  4 {
  5     int x;
  6     int y;
  7 };
  8 void assign(struct coo A)
  9 {
 10     A.x=2;
 11     A.y=2;
 12 }
 13 int main()
 14 {
 15  struct coo loc;
 16  loc.x=1;
 17  loc.y=1;
 18  assign(loc);
 19
 20  printf("%d,%d\n",loc.x,loc.y);
 21  return 0;
 22 }

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