DISPLAY NUMBERS IN DIOGNALY

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#include<iostream.h> #include<conio.h> int n=1,i=0; class numbers { public: void display() { cout<<"\n"; for(i=1;i<=n;i++) { cout<<" "<<i; } } void next() { if(n<20) { n++; display(); next(); } } }; void main() { numbers s; clrscr(); s.display(); s.next(); getch(); }