printf("%f %f\n", inf / inf, -(inf / inf)); // -1.#IND00 -1.#IND00
printf("%.4f %.4f\n", inf / inf, -(inf / inf)); // -1.#IND -1.#IND
printf("%.10f %.10f\n", inf / inf, -(inf / inf)); // -1.#IND000000 -1.#IND000000
####
printf("%g %g\n", inf / inf, -(inf / inf)); // -1.#IND -1.#IND
##
##
print +( 10.0**20 + 1 ) - 10.0**20;;
0
print +( 10.0**20 - 10.0**20 ) + 1;;
1