Codam C Piscine C02

print_first_digit

• Write a function which prints only the first digit of the unsigned integer num represented in the decimal numeral system.
• Decimal Numeral System as explained by Wikipedia

include <stdio.h>

void print_first_digit(unsigned int num);

int main()
{
    print_first_digit(39);
    return 0;
}

Example output:

$ ./a.out
9$