The pow Function in C & C++

More functions from the  <math.h> or <cmath> header files. Today it’s about the pow function.

 

The pow function is straightforward. Given values for x and n, the function returns x to the nth power.

From C11 standard.

 

Test Code.

I tested the functions in Visual C++ 2010 as an console application.

// The standard library includes the system function.

#include <cstdlib>

// C++ standard I/O library.

#include <cstdio>

// C++ math library.

#include <cmath>

int main()

{

     // Header.

     printf("The pow Function in C & C++\n\n");

     printf("Given x and n, the function returns x to the nth power.\n\n");

     // Counter for loop.

     int i;

     // Argument.

     double x, n;

     // Result.

     double y;

     printf(" y    =    x   ^ n\n\n");

     for (i = 1; i < 10; ++i)

     {

           x = 12.3456 / i;

           n = i;

           y = pow(x, n);

           printf ("%5.2f = %6.3f ^ %1.0f\n", y, x, n);

     }

     // Keep console window open.

     system("pause");

     // Return some value.

     return 0;

} // end main

Output.