how to rand between three integer num1 num2 num 3

You want a random selection. There are a few ways, but storing those items in a container for random indexing is by far the simplest:

``````#include <array>
#include <cstdlib>
#include <ctime>
#include <iostream>

using namespace std;

int main()
{
srand((unsigned)time(nullptr));

array<int, 3> a = {11, 22, 33}; …``````

My C is bit rusty but in pseudo code
(max_of_random - min_of__random)/(wanted_max-wanted_min)*random_value +wanted_min

## All 8 Replies

then use this function : srand(i)%3+1

commented: Learn to use the function before telling someone how to wrongly use it. -3

for example we have obj1 obj2 obj3
can you right for me the random formula ?

You want a random selection. There are a few ways, but storing those items in a container for random indexing is by far the simplest:

``````#include <array>
#include <cstdlib>
#include <ctime>
#include <iostream>

using namespace std;

int main()
{
srand((unsigned)time(nullptr));

array<int, 3> a = {11, 22, 33};

cout<<"Random element: "<< a.at(rand() % a.size()) <<'\n';
}``````

nop it's not what i mean

let say that:
num=num2/3
num1=num3/5

how to make random between num and num1

My C is bit rusty but in pseudo code
(max_of_random - min_of__random)/(wanted_max-wanted_min)*random_value +wanted_min

let say that:
num=num2/3
num1=num3/5

how to make random between num and num1

Assuming num < num1: `random-number = (rand() % (num1 - num)) + num`

>>how to rand between three integer num1 num2 num 3

You say in between the three integers. That means one of the numbers, either num1, num2 or num3 has to be a min or the max. Which means the last one has to fall in between. Thus this implies that you want a number in the range of , [ min(num1,num2,num3) to max(num1,num2,num3) ]; So a general formula is `rand() % (max - min ) + min` , or `min + (max-min) * (rand()/(float(RAND_MAX+1))`

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