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#Leap year problem in C++: print it in your Code::blocks: #include <iostream> using namespace std; int main() {     cout<<"Enter the year:";     int x;     cin>>x;     if(x%4==0)     {         cout<<"yes this year is leap year :)";     }     else if(x%400==0)     {         cout<<"yes this year is leap year :)";     }     else if(x%100==0)     {         cout<<"no this year is not leap year :(";     }     else     {         cout<<"no this year is not leap year :( ";     } } #another code #positive or negative number found print it in your Code::blocks: #include <iostream> using namespace std; int main() {     int n;     cin>>n;     if(n...