6. Calculate the sum of all numbers containing 6 within 1~100.

#include<stdio.h>
int  main()
{
    
    
	int n = 1, sum = 0; 
	for (n = 1; n <= 100; n++)
	{
    
    
		if (n % 10 == 6 || n / 10 == 6)
		{
    
    
			sum += n;
			printf("%d\n", n);
		}
	}
	printf("%d", sum);
	return 0;
}