// Code to illustrate strings and structs in C

#include <string.h>
#include <stdio.h>
#include <stdlib.h>

struct Point {
  double x, y;
};

typedef struct{
  int x, y;
} Coordinate;
  
int main()
{
  // structs

  struct Point a;
  a.x = a.y = 6.0221408e+23;

  Coordinate b;
  b.y = -1;

  // using the heap
  struct Point *c = malloc(sizeof(struct Point));
  c->x = -30e-300;

  // strings

  char name[9];
  strcpy(name, "a name");       // assignment for strings
  printf("Enter %s (up to 8 letters): ", name);
  scanf("%s", name);            // try entering more!
  printf("Hello, %s\n", name);
  // truncate to 2 letters
  name[2] = '\0';
  // randomly add the suffix "sen"
  strcat(name, "sen");
  printf("After mangling, we now declare you to be %s\n", name);
  // downcase first letter
  if ( name[0] >= 'A' && name[0] <= 'Z' )
    name[0] = name[0] - 'A' + 'a';
  if ( strcmp(name, "ibsen") == 0 )
    printf("Hello, famous playwright\n");
  return 0;
}