Demos some basic properties of struct assignments.

StructAssignment.c

#include <stdio.h>

typedef struct {
  int x;
  int y;
} point_t;

void printPoint(point_t p)  {
  printf("X: %d, Y: %d\n", p.x, p.y);
}

int main (int argc, char* argv[]) {
  point_t x1 = {.x=10, .y=20};
  point_t x2 = {.x=30, .y=40};
    
  x2 = x1;
    
  printPoint(x1);
  printPoint(x2);
}