I thought I understood this.

Im taking in some command line arguments, they are floats. how come this doesnt work?

float tol = atof(argv[2]);

printf("%f Tol:\n",tol);

it prints a very large number, im assuming the mem location.


any help is greatly appreciated, I have tried it with sscanf to no avail as well.

this is in c, compiled in unix with gcc.

Make sure you are including stdlib.h in your program.

Since you're using gcc, you should always build with the -Wall flag. That would have pointed you in the direction of a missing stdlib.h (which does indeed sound like the problem). -Wall will enable more warnings, and when you get a warning, you should fix it.