The for loop in the following function does not seem to store correctly. The value that returns for range_angle
is the very first value, which I know is not correct. Also, my compute_landing_distance
function (not shown here) works just fine, so it must be something in the for loop:
for (theta_l_deg=22.5; theta_l_deg<=83;.01)
{
x_f = compute_landing_distance(v0,theta_l_deg);
if (x_f > range_distance)
{
range_distance = x_f;
range_angle = theta_l_deg;
}
else
{
break;
}
}
return range_angle;
I want this loop to run from theta_l_deg
= 22.5
to 83
in increments of .01
, and return the largest value for range_angle
in that range. Also, I am aware that C only calculates in radians, and the compute_landing_distance
function takes that into account.
for (theta_l_deg=22.5; theta_l_deg<=83;.01)
should be
for ( theta_l_deg = 22.5 ; theta_l_deg <= 83 ; theta_l_deg += 0.01 )
In your original code, you are not incrementing the value of theta_l_deg
for (theta_l_deg=22.5; theta_l_deg<=83; theta_l_deg+=0.01)
{
x_f = compute_landing_distance(v0,theta_l_deg);
if (x_f > range_distance)
{
range_distance = x_f;
range_angle = theta_l_deg;
}
else
{
break;
}
}
return range_angle;
Wrong for loop, missing increment
for (theta_l_deg=22.5; theta_l_deg<=83;.01)
should be
for (theta_l_deg=22.5; theta_l_deg<=83; theta_l_deg += .01)
Read http://floating-point-gui.de/ and notice that 0.01
is not exactly representable as IEEE754
BTW, you should compile with all warnings and debug info: gcc -Wall -Wextra -g
if using GCC .
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