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#include <iostream> using namespace std; class T4Tutorials { public: long int num,i; }; class T4Tutorials2 { public: int sum=0,k=9; }; class child:public T4Tutorials,public T4Tutorials2 { public: int function() { cout<<"input the number of terms"; cin>>num; for(i=1;i<=num;i++) { sum=sum+k; k=k*10+9; } cout<<"sum of series"<<sum; } }; int main() { child obj; obj.function(); } |