Blue Bridge Cup - 2014 C ++ A first set of questions: guess the age [enumeration]

I, entitled

Xiao Ming with two sisters to attend Lantern Festival. When asked how old they are, they playfully said: "The product of the age of the two of us six times and the age of." Xiao Ming added: "They are not twins, age difference and certainly not more than 8 years old ah."

Please write: younger sister Xiao Ming.

Note: write only a person's age, number, please submit your answers via the browser. Do not write any extra content.

Second, the idea

Determine the scope of the direct cycle of violence.

Third, the problem solution

#include <iostream>
using namespace std;
int main()
{
    for (int lil_sis_age=1;lil_sis_age<30;lil_sis_age++)
    {
        for (int differ=1;differ<=8;differ++)
        {
            int big_sis_age = lil_sis_age + differ;
            if(lil_sis_age*big_sis_age==(lil_sis_age+big_sis_age)*6)
            {
                cout << lil_sis_age << endl;
            }
        }
    }
    return 0;
}

 

Fourth, the results

10

Process finished with exit code 0