c++ - Appending a number to a number? -

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how cold following:

say have number 10 , append number 317 it. resulting integer 10317. how can done. also, once have number, how example remove 17 off end. without using strings, , without obvious solving , adding.

thanks

this append both numbers

int append_a_and_b_as_int(int a, int b) {     for(int tmp = b; tmp > 0; tmp % 10)     {         *= 10;     }     return + b; }

this rid of last n numbers

int remove_n_numbers_from_a(int n, int a) {     for(int = 0; < n; i++)     {         /= 10;     }     return a; }

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