How to do a root operation with an index that has a variable"

I have a process returned statement stating "Process returned -1073741676 (0xC0000094)" with no actual result of the operation preformed. I would like to do the following operation root(n-1,a/b)

Replacing the operations within the pow operation with defined variables. The compiler is GNU CC. I am using Code::Blocks.

   #include <iostream>  
   #include <cmath>
   #include <math.h>
   using namespace std;
   float r;
   int a;
   int an;
   float n;
   int c;
   int choice;
   int findve;
   int rmdr;
   int k = pow(r,(n-1));
   int b;
   int j;
   int main (){
    //***In case the element missing is r***
           if (findve == 2){
                  cout << "intput an \n";
                cin >> an;
                  cout << "Input a \n";
                cin >> a;
                  cout << "Input n \n";
                cin >> c;
                   j = (pow((a/b),(1/(c-1))));
               cout << "The ratio is " << j;
    return 0;    }
   }

I expected for j to show up within the console however no result showed up and the following message shows in console is "Process returned -1073741676 (0xC0000094)". The message on the build log states "Process terminated with status -1073741676" I am attempting to do the following operation root(n-1,a/b)