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Check if a number is a power of another number in C++
Here we will see, whether a number is power of another number or not. Suppose a number 125, and another number 5 is given. So it will return true when it finds that 125 is power of 5. In this case it is true. 125 = 53.
Algorithm
isRepresentPower(x, y): Begin if x = 1, then if y = 1, return true, otherwise false pow := 1 while pow < y, do pow := pow * x done if pow = y, then return true return false End
Example
#include<iostream> #include<cmath> using namespace std; bool isRepresentPower(int x, int y) { if (x == 1) return (y == 1); long int pow = 1; while (pow < y) pow *= x; if(pow == y) return true; return false; } int main() { int x = 5, y = 125; cout << (isRepresentPower(x, y) ? "Can be represented" : "Cannot be represented"); }
Output
Can be represented
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