// x^y=y^x
// 12/22/19 Peter G. post
// lrb

// gcc xyyx.c -o xyyx.exe -lm

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

void main(void) {
 printf("\nxyyx.c - lrb - 12/31/19\n");
 FILE *xyyx;
 double x,y,t,del1=.01;
 int cnt=0;
 xyyx=fopen("xyyx.txt","w");
 for (x=1;x<100;x+=del1) {
  for (y=1;y<100;y+=del1) {
   if (x==y) {continue;}
   t=pow(x,y)-pow(y,x);
   if (t<0) t=-t;
   if (t<.001) {
    cnt+=1;
    if (cnt%10==0) {printf(".");}
    fprintf(xyyx,"%.1lf,%.1lf\n",x,y);
    }
   }
  } 
 printf("\nxyyx.txt written!");
 }