text: #include <stdio.h>
  
  int main()
  {
      char c;
      int i;
      float f;
      printf("size of char : %d\n", sizeof(c));  // 1
      printf("size of int : %d\n", sizeof(i));   // 4
      printf("size of float : %d\n", sizeof(f)); // 4
  
      printf("size of long long : %d\n", sizeof(long long)); // 8
      printf("size of double : %d\n", sizeof(double));       // 8
  
      char str1[] = "Hello World!";
      printf("size of str1 : %d\n", sizeof(str1)); // 13
  
      int str2[] = {0, 1, 2, 50, 100, 12, 123451};
      printf("size of str2 : %d\n", sizeof(str2));                     // 28
      printf("length of str2 : %d\n", sizeof(str2) / sizeof(str2[0])); // 7
      // printf("length of str2 : %d\n", sizeof(str2) / sizeof(int));     // 7
  
      return 0;
  }