random numbers

[poolet21]

I have a problem and i need some help. The program must print out 5 random numbers , from 1 to 45 and 100 different sequence.. Now I want each number of sequence to be different and not the same.... any ideas ?

for example

1,2,3,4,5
6,7,8,9,10
....
...
..

here is my code:

#include <iostream>
#include <ctime> 
#include <cstdlib> 

using namespace std;

int main ()
{
	int xRan1;
	
	srand( time(0)); 
	
	for (int j =0; j <100; j++) {  
		
	for (int i =0; i <5;  i++){ 
	xRan1=rand()%45+1;
        cout <<" " <<xRan1<<",";
		}
		
	cout << endl;
		}
	
	return 0;
}

[keskiverto]

While not enough numbers in set:
1. Generate a number
2. If it is already in the set, then discard, otherwise add to the set

Print the complete set

[Smac89]

If you want to have unique numbers per sequence, then you only have 9 combinations, but if you want unique sequences then there are 1,221,759 different combinations:

http://en.wikipedia.org/wiki/Combination