how to change this simple opeation into power operation..

[transgalactic2]

I got this simple operation of 2 equal matrix multiplication:
How to change it so if i enter a number
it will put the matrix into the power of the input number.

How do i transform some how this simple multiplication operation into a power operation.

Ii have tried to use temporary matrix to save the local multiplication.
and multiply by it on the next step
but its not working
??

#include <stdio.h>




int main(){//star
    int rows,cols,jndex,input;
    int sum2=0;
    printf("enter rows and cols [1..50] ==> ");
    scanf("%d %d",&rows,&cols);
    int matrix[rows][cols];
    int sum[rows][cols];
    int temp[rows][cols];
    int transpose [cols][rows];
    int index,kndex,tndex,gndex,lndex;
printf("enter power:");
      scanf("%d",&input);

    for (index=0;index<rows;index++){

        for (kndex=0;kndex<cols;kndex++){
           matrix[index][kndex]=0;
           sum[index][kndex]=0;
           temp[index][kndex]=0;
           transpose[index][kndex]=0;
        }//end inner for
    }//end outer for

printf("enter numbers in a row for a matrix:");                                                 //stat input

      for (index=rows-1;index>=0;index--){

           for (kndex=cols-1;kndex>=0;kndex--){

             scanf("%d",&matrix[index][kndex]);

             transpose [kndex][index]=matrix[index][kndex];
           }

        }

getchar();  //needed because of scanf()
                                             //end input










                                             //start power operation



                                       //start temp=matrix
    for (gndex=0;gndex<rows;gndex++){

        for (lndex=0;lndex<cols;lndex++){

           temp[index][kndex]=matrix[index][kndex];

        }//end inner for
    }//end outer for
                                    //end temp=matrix
  for (tndex=0;tndex<input;tndex++){

                    for(index=0;index<rows;index++) {
                       for(jndex=0;jndex< cols;jndex++) {

                                 sum[index][jndex]=0;
                                    for(kndex=0;kndex<cols;kndex++) {
                                        sum[index][jndex] = sum[index][jndex] + temp[index][kndex] * matrix[kndex][jndex];
                                    }
                        }
                     }



                                       //start temp=sum
    for (gndex=0;gndex<rows;gndex++){

        for (lndex=0;lndex<cols;lndex++){

           temp[index][kndex]=sum[index][kndex];

        }//end inner for
    }//end outer for
                                    //end temp=sum
  }

                                          //end power operation


                //start print

        for (index=0;index<rows;index++){

           for (kndex=0;kndex<cols;kndex++){

             printf("%d ",sum[index][kndex]);
           }
           printf("\n");
        }

                                          //end print

                printf("\n");





    return 0;
}//end main func