1. Converting a (simple) program from Python to Euphoria
- Posted by ed_davis Dec 04, 2013
- 1499 views
I have a simple C program that I use for integer bench-marks, that I'd like to convert to Euphoria. Here is the C version.
#include <stdio.h>
int main() {
int left_edge, right_edge, top_edge, bottom_edge, max_iter,
x_step, y_step, y0, x0, x, y, i, x_x, y_y, temp, the_char,
accum, count;
accum = 0;
count = 0;
while (count < 1065) {
left_edge = -21000; // left edge = -2.1
right_edge = 15000; // right edge = 1.5
top_edge = 15000; // top edge = 1.5
bottom_edge = -15000; // bottom edge = -1.5
max_iter = 200; // max iteration depth
x_step = 350; // x step size
y_step = 750; // y step size
y0 = top_edge;
while (y0 > bottom_edge) { // y0
x0 = left_edge;
while (x0 < right_edge) { // x0
y = 0; // y
x = 0; // x
the_char = ' '; // char to be displayed
x_x = 0;
y_y = 0;
i = 0;
while (i < max_iter && x_x + y_y <= 40000) { // iteration
x_x = (x/10 * x) / 1000; // x*x
y_y = (y/10 * y) / 1000; // y*y
if (x_x + y_y > 40000) {
the_char = '0' + i; // print digit 0...9
if (i > 9) { // if iteration count > 9,
the_char = '@'; // print '@'
}
} else {
temp = x_x - y_y + x0; // temp = x*x - y*y + x0
y = (x/10 * y) / 500 + y0; // y = 2*x*y + y0
x = temp; // x = temp
}
i = i + 1;
}
accum = accum + the_char;
x0 = x0 + x_step;
}
y0 = y0 - y_step;
}
if (count % 100 == 0)
printf("%d\n", accum);
count = count + 1;
}
printf("%d\n", accum);
return 0;
}
It generates this output:
200976 20298576 40396176 60493776 80591376 100688976 120786576 140884176 160981776 181079376 201176976 214039440
I converted it to Python, and it generates the same list of numbers as above:
accum = 0
count = 0
while count < 1065: # 1065
left_edge = -21000 # left edge = -2.1
right_edge = 15000 # right edge = 1.5
top_edge = 15000 # top edge = 1.5
bottom_edge = -15000 # bottom edge = -1.5
max_iter = 200 # max iteration depth
x_step = 350 # x step size
y_step = 750 # y step size
y0 = top_edge
while y0 > bottom_edge: # y0
x0 = left_edge
while x0 < right_edge: # x0
y = 0 # y
x = 0 # x
the_char = 32 # char to be displayed
x_x = 0
y_y = 0
i = 0
while i < max_iter and x_x + y_y <= 40000: # iteration
x_x = int((int(x/10)* x) / 1000) # x*x
y_y = int((int(y/10)* y) / 1000) # y*y
if x_x + y_y > 40000:
the_char = 48 + i # print digit 0...9
if i > 9: # if iteration count > 9,
the_char = 64 # print '@'
else:
temp = x_x - y_y + x0 # temp = x*x - y*y + x0
y = int((int(x/10) * y) / 500) + y0 # y = 2*x*y + y0
x = temp # x = temp
i = i + 1
accum = accum + the_char
x0 = x0 + x_step
y0 = y0 - y_step
if count % 100 == 0:
print(accum)
count = count + 1
print(accum)
Finally, I converted it to Euphoria:
integer left_edge, right_edge, top_edge, bottom_edge, max_iter, x_step, y_step, y0, x0, x, y, i, x_x, y_y, temp, the_char, accum, count accum = 0 count = 0 while count < 1065 do -- 1065 left_edge = -21000 -- left edge = -2.1 right_edge = 15000 -- right edge = 1.5 top_edge = 15000 -- top edge = 1.5 bottom_edge = -15000 -- bottom edge = -1.5 max_iter = 200 -- max iteration depth x_step = 350 -- x step size y_step = 750 -- y step size y0 = top_edge while y0 > bottom_edge do -- y0 x0 = left_edge while x0 < right_edge do -- x0 y = 0 -- y x = 0 -- x the_char = 32 -- char to be displayed x_x = 0 y_y = 0 i = 0 while i < max_iter and x_x + y_y <= 40000 do -- iteration x_x = floor((floor(x/10) * x) / 1000) -- x*x y_y = floor((floor(y/10) * y) / 1000) -- y*y if x_x + y_y > 40000 then the_char = 48 + i -- print digit 0...9 if i > 9 then -- if iteration count > 9, the_char = 64 -- print '@' end if else temp = x_x - y_y + x0 -- temp = x*x - y*y + x0 y = floor((floor(x/10) * y) / 500) + y0 -- y = 2*x*y + y0 x = temp -- x = temp end if i = i + 1 end while accum = accum + the_char x0 = x0 + x_step end while y0 = y0 - y_step end while if remainder(count, 100) = 0 then ? accum end if count = count + 1 end while ? accum
But it generates a different list of numbers:
201054 20306454 40411854 60517254 80622654 100728054 120833454 140938854 161044254 181149654 201255054 214122510
Can anyone spot where I went wrong? All 3 versions appear pretty much the same, especially the Python and Euphoria one.
Any help is appreciated!
2. Re: Converting a (simple) program from Python to Euphoria
- Posted by andi49 Dec 04, 2013
- 1439 views
Hallo
you may try:
include std/math.e
and use trunc() instead of floor()
Don't know if this is the fastest way
Andreas
3. Re: Converting a (simple) program from Python to Euphoria
- Posted by ed_davis Dec 04, 2013
- 1431 views
andi49 said...
you may try:
include std/math.e
and use trunc() instead of floor()
Don't know if this is the fastest way
Andreas
That solved it! Thanks so much! And thanks for the very quick response!
