C++ 一个三位整数n,请输出它的各个位

#include <stdio.h>
#include <stdlib.h>
void main()
{
int num;
char str[4];
printf("输入一个三位整数:\n");
scanf("%d", &num);
itoa(num,str,10);
printf("百位%c，十位%c，个位%c\n",str[0],str[1],str[2]);
}

#include<stdio.h>

int main()
{
int n,x,y,z = 100;

printf("input a num:\n");
scanf("%d",&n);

for(int i = 3; i > 0; i--)
{
x = n / z;
y = n % z;
printf("该三位数的第%d位数为:%d\n",i,x);
n = y;
z = z/10;
}
return 0;
}

#include<iostream>

using namespace std;

int main(void)
{
int n;

printf("Please input an integer:\n");
scanf("%d", &n);
printf("%d %d %d\n", n/100, (n/10)%10, n%10);

return 0;
}

#include <iostream