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AnswerRe: Problem with multiple bouncing balls program in C Pin
Richard MacCutchan19-Jan-18 1:36
mveRichard MacCutchan19-Jan-18 1:36 
AnswerRe: Problem with multiple bouncing balls program in C Pin
Member 1363226319-Jan-18 1:59
Member 1363226319-Jan-18 1:59 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Richard MacCutchan19-Jan-18 2:05
mveRichard MacCutchan19-Jan-18 2:05 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Member 1363226319-Jan-18 2:22
Member 1363226319-Jan-18 2:22 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Richard MacCutchan19-Jan-18 2:23
mveRichard MacCutchan19-Jan-18 2:23 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Member 1363226319-Jan-18 2:54
Member 1363226319-Jan-18 2:54 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Richard MacCutchan19-Jan-18 3:51
mveRichard MacCutchan19-Jan-18 3:51 
AnswerRe: Problem with multiple bouncing balls program in C Pin
Jochen Arndt19-Jan-18 2:07
professionalJochen Arndt19-Jan-18 2:07 
You might get out of bound array accesses when step is always >= 0.63:
total=n*7;
num=(int *) malloc(total*sizeof(int));
// ...
do
{
    j=0;
    for(i=0; i<=n; i++)
    {
        if (step >= 0.03)
        {
            // Possible out of bound accesses here (j >= total)
            // ...
            j=j+7;
        }
    }
}
while (!kbhit());
You have to change the for loop to
for(i=0; i<n; i++)
I also don't understand why you are only updating when step is large enough. If that does not happen, balls at the end of the array will be updated less often than the initial ones.

You are checking if the new ball position is outside and inverts the direction if so but are still drawing the ball when outside. A better solution might be drawing it at the border (here for x):
if (num[j]+num[j+4]>=getmaxx() || num[j]-num[j+4]<=0)
{
    num[j+5] *= -1;
    if (num[j]+num[j+4] > getmaxx())
        num[j] = getmaxx() - num[j+4];
    if (num[j]-num[j+4] < 0)
        num[j] = num[j+4];
}

Finally it might not work as expected because you have up to 7 balls and did not handle overlapping ones. I guess you want to detect also ball collisions which would result in no overlapping. But that is also not handled by your code.
GeneralRe: Problem with multiple bouncing balls program in C Pin
Member 1363226319-Jan-18 2:53
Member 1363226319-Jan-18 2:53 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Jochen Arndt19-Jan-18 3:21
professionalJochen Arndt19-Jan-18 3:21 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Member 1363226319-Jan-18 3:30
Member 1363226319-Jan-18 3:30 
GeneralRe: Problem with multiple bouncing balls program in C Pin
Jochen Arndt19-Jan-18 3:56
professionalJochen Arndt19-Jan-18 3:56 
AnswerRe: Problem with multiple bouncing balls program in C Pin
Victor Nijegorodov19-Jan-18 22:21
Victor Nijegorodov19-Jan-18 22:21 
AnswerRe: Problem with multiple bouncing balls program in C Pin
Rick York24-Jan-18 8:17
mveRick York24-Jan-18 8:17 
Questionconvert feet and inches to centimeters Pin
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SuggestionRe: convert feet and inches to centimeters Pin
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AnswerRe: convert feet and inches to centimeters Pin
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AnswerRe: convert feet and inches to centimeters Pin
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AnswerRe: Start app without taskbar icon Pin
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AnswerRe: Start app without taskbar icon Pin
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GeneralRe: Start app without taskbar icon Pin
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