How do I find the next multiple of 10 of any integer?

Question

Dynamic integer will be any number from 0 to 150.

i.e. - number returns 41, need to return 50. If number is 10 need to return 10. Number is 1 need to return 10.

Answer 1

int n,res;
...

res = n%10 ? n+10-(n%10) : n;

or

res = (n / 10)*10 + ((n % 10) ? 10:0);