**#include (iostream.h)**

**#include(conio.h)**

**#include (math.h)**

**double power(int m, int n = 2)**

**{**

**double res = pow(m,n);**

**return res;**

**}**

**void main()**

**{**

**int x;**

**cout<< "\n Enter a number to calculate its square :";**

**double d = power(x);**

**cout<< "\n The square of " << x <<"is " << d;**

**cout<< "\n Enter a number to calculate its cube :";**

**d = power(x,3);**

**cout<< "\n The cube of " << x <<"is " << d;**

**int y;**

**cout<< "\n Enter a number and its power to calculate the result :";**

**cin>>x>>y;**

**d = power(x,y);**

**cout<< "\n The " << x << " to the power " << y <<" is " << d;**

**getch();**

**}**

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