Your problem is neither new nor python specific but is inherent to floating point computations. All dynosaurus that once used Fortran 4 know it : you as the programmer have to know the expected precision ε of your computation. So : two numbers x and y are to be considered...

Your array is declared as: solvent_p solvent[4000]; but you have this loop: for(i=0;i<=9999;i++) with this function call inside: printf("1 :%d \t %f \t %f \n",j,solvent[j].rx,solvent[i].ry); which means you are accessing out-of-bounds array elements. EDIT: OP test case has been edited to fix the out-of-bound accesses. My second suggestion is to...

python,math,modular-arithmetic,ceil

Assuming the indentation issue is not a real issue, the issue is that your numbers can reach below 1 when going recursively, and then once it reaches below 1 (that is n reaches 0 ) , it keeps on calling SBSeq recursively without exiting. The condition in the start of...

Use the numpy.ceil() function instead. The Numpy package offers vectorized versions of most of the standard math functions. In [29]: import numpy as np In [30]: a = np.arange(2, 3, 0.1) In [31]: a Out[31]: array([ 2. , 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9]) In [32]: np.ceil(a)...

double ceil() { return ::ceil(something); // ceil actually has an argument } Of course, that above is when you define the method inside the class definition; the following is for when you define the method outside the class: double MyClass::ceil() { return ::ceil(something); } And as the comment suggests, using...

The functions ceil() and floor() will return different numbers than what you get by using up = (int)(test + 1); down = (int)test; when you have a negative number. If you have: float test = -1.3548; up = (int)test; // ceil() down = (int)(test-1); // floor() Even the last statement...

I had the same problem with another PHP function. You can create "your own ceil function". In that case it is very easy to solve: function myCeil(&$list){ $list = ceil($list); } $numbs = array(3, 5.5, -10.5); array_walk($numbs, "myCeil"); print_r($numbs); ...