c语言中文件比例注释

#include <bits/stdc++.h>
using namespace std;
#define int long long
int size, len;
char chr;
bool fg1 = false, fg2 = false; 
signed main()
{
    freopen("filein.c", "r", stdin);
    for(; (chr = cin.get()) != EOF; ++size) {
        if(fg1 && fg2) ++len;
        if(chr == '/' && !fg2) fg1 = !fg1;
        if (chr == '*' && fg1)
        {
            fg2 = !fg2;
            if(!fg2) --len; 
        }
    }
       cout << (int)((double)(len) / size * 100) << "%" << endl;
}

C++