the calc.sh is a file to generate a real-time c programa that can work out the calculation of the fixed expressions, it's easy to use the c compiler to do the work for us instead of my tring to build 2 stacks to store the numbers and the operators. but you know it's just a new trial of some AI simulation. Use Program to Program for us, What a fun!

if you need to use the calculator to do some math, I suggest that your expression to be calclutated doesn't contain any white space, so that my program won't recognize them to be different expression intstead of regarding them as a whole body.