Learn point C language (25): Data type

Source: Internet
Author: User
Tags printf

1. Structure array:

#include <stdio.h>

int main(void)
{
  struct Rec {int x,y;};

  struct Rec rs[10];

  size_t i;
  for (i = 0; i < sizeof rs/sizeof rs[0]; i++) {
    rs[i].x = i;
    rs[i].y = i * 2;
  }

  for (i = 0; i < sizeof rs/sizeof rs[0]; i++) {
    printf("%d, %d\n", rs[i].x, rs[i].y);
  }

  getchar();
  return 0;
}

#include <stdio.h>

int main(void)
{
  struct Rec {
    char name[12];
    short age;
  } rs[3] = {
        {"AAA", 11},
        {"BBB", 22},
        {"CCC", 22}
       };

  size_t i;

  for (i = 0; i < sizeof rs/sizeof rs[0]; i++) {
    printf("%s, %d\n", rs[i].name, rs[i].age);
  }

  getchar();
  return 0;
}

2. The structure pointer points to an existing array of structures:

#include <stdio.h>

int main(void)
{
  struct Rec {
    char name[12];
    short age;
  } rs[3] = {
        {"AAA", 11},
        {"BBB", 22},
        {"CCC", 22}
       };

  struct Rec *p = rs;

  printf("%s, %d\n", p->name, p->age);
  printf("%s, %d\n", (p+1)->name, (p+1)->age);
  printf("%s, %d\n", (p+2)->name, (p+2)->age);

  getchar();
  return 0;
}

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