c言語の遊び

a.c

#include <stdio.h>

int main(){
  char *a = "abc";
  printf("%s\n",a);
  int i = 0;
  for(i=0; *(a + i) != '\0'; i++){
    printf("%c\n",*(a+i));
  }
  for(i=0; a[i] != '\0'; i++){
    printf("%c\n",a[i]);
  }
  for(; *a != '\0'; ){
    printf("%c\n",*a);
    a++;
  }
  for(; *a != '\0'; ){
    printf("%c\n",*a);
    a++;
  }
  
  char *str_ar[] = {"12","3456"};
  for(i=0;i<2;i++){
    char *x = str_ar[i];
    printf("%s\n",x);
    for(; *x != '\0'; ){
      printf("%c\n",*x);
      x++;
    }
  }
  
  return 0;   
}