Prime C++第五版修正

p41错误更正
1.4.4 if语句

#include
int main()
{
    int currVa1 = 0, va1 = 0;
    if (std::cin >> currVa1){ 
        int cnt = 1;
        while (std::cin >> va1)
        {
            if (va1 == currVa1)
                ++cnt;
            else {
                std::cout << currVa1 << " occurs " << cnt << " times " << std::endl;
                currVa1 = va1;
                cnt = 1;
            }

            std::cout << currVa1 << " occurs " << cnt << " times " << std::endl;
        }
        }
    return 0;
}