How to separate a three-digit number in the C language?

We can separate a three-digit number using the modulo operation. Let’s assume the three-digit number we want to separate is called num.

1. To extract the hundreds digit: dividing the number by 100 will give you the value of the hundreds digit.
2. To extract the tens digit: use (num / 10) % 10 to obtain the value of the tens digit. Divide num by 10 first, then take the remainder when divided by 10.
3. To isolate the units digit: You can obtain the value of the units digit by using num % 10, which is simply finding the remainder when num is divided by 10.

Here is a sample code:

#include <stdio.h>

int main() {
    int num, hundreds, tens, units;
    
    printf("请输入一个三位数：");
    scanf("%d", &num);
    
    hundreds = num / 100;
    tens = (num / 10) % 10;
    units = num % 10;
    
    printf("百位数：%d\n", hundreds);
    printf("十位数：%d\n", tens);
    printf("个位数：%d\n", units);
    
    return 0;
}

After running the program, the user inputs a three-digit number, which the program will then separate into hundreds, tens, and units places and output.