PROJECT EULER SOLUTION # 99

Solution to problem number 99 of Project Euler.

Question # 99

Comparing two numbers written in index form like 2¹¹ and 3⁷ is not difficult, as any calculator would confirm that 2¹¹ = 2048 3⁷ = 2187.
However, confirming that 632382⁵¹⁸⁰⁶¹ 519432⁵²⁵⁸⁰⁶ would be much more difficult, as both numbers contain over three million digits.
Using base_exp.txt (right click and 'Save Link/Target As...'), a 22K text file containing one thousand lines with a base/exponent pair on each line, determine which line number has the greatest numerical value.

NOTE: The first two lines in the file represent the numbers in the example given above.

Solution # 99

/***************************************************************************************/

#include<stdio.h>

#include<conio.h>

#include<math.h>

int main()

{

       long n1,n2;

       char c;

       double tmp,max=0;

       int counter=0,countermax=0;

       FILE*fp;

       clrscr();

       if(fp=fopen("d:/a.txt","r"))

       {

              while(!feof(fp))

              {

                     counter++;

                     fscanf(fp,"%ld",&n1);

                     fscanf(fp," %c",&c);

                     fscanf(fp,"%ld",&n2);

                     tmp=(double)n2*log(n1);

                     if(tmp>max)

                     {

                           countermax=counter;

                           max=tmp;

                     }

              }

              printf("tmp = %lf  countermax = %d",max,countermax);

              fclose(fp);

       }

       else

              printf("there was an error in opening the file");

       getch();

       return 0;

}

/***************************************************************************************/