奇数桁と偶数桁の差を計算するCプログラム

Input:12345 Output:3

the odd digits is 2+4=6 the even digits is 1+3+5=9 odd-even=9-6=3

#include  using namespace std; int main() { int n, r=0; int diff =0; int even=0; int odd=0; n=12345; while(n != 0){ r = n%10; if(r % 2 == 0) { even+=r; } else { odd+=r; } n/=10; } diff=odd-even; printf("%d",diff); return 0; }