Random numbers??

[Naits]

How to get a random number between 1 and 10?? I tried this:
a = 1+rand() %10;
Worked in dos mode, but not in Win 32. __________________
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[qedusa]

Hi, one simple method I have used before is to use a while loop to increment or decrement the returned random number to within range:

int myRandNumber = rand(); // get the random number
int myRandRange = 10; // the limiting range
// if the number is greater than the limiting range
// reduce it by limits - eg. if returned number is 15
// it will become 5 when while loop stops
while (myRandNumber > 10)
myRandNumber -= myRandRange;
// if the number is less than the limiting range
// increase it by the range
while (myRandNumber < 1)
myRandNumber += myRandRange;

This is probably not the best way to do this but it works a treat!

 

[Naits]

Sorry my fault, Just found out that a = 1+rand() %10; works fine...... __________________
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[dcgsmix]

You can use this:

(int)((upperbound - lowerbound + 1) * rand() + lowerbound)

if you want bitween 1 to 10:

(int)((10-1+1) * rand() +1)

so every number that you want biween 1 to something:

(int)(maxnumber * rand() +1)

Daniel Cohen Gindi
dcgsmix@gmx.net

 

[Zyrenthian]

You will need to seed the random function if you want different random numbers each time

srand(time(NULL));

Otherwise you will see the same random sequence (not so random)


Matt