make a c++ Inteface/ programm which can input 1 No. and display these message
1. If we put no = 1 then it call function Armstrong
2. If no = 2 then ................ it show prime
3. iff no.3 then input one string and revers them
4. if no.4 convert them in upper CAse
5. f no.5 then nput 1 no. and display pyramid
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