All permutations by Jim

#include <stdio.h>
int mark[5];
int permuted[5];
int ara[] = {1, 2, 3, 4, 5};
void perm(int n)
{
    int i;
    for(i = 0; i<5; i++){
        if(mark[i]==0){
            permuted[n] = ara[i];
            mark[i] = 1;
            if(n==4){
                printf("%d %d %d %d %d\n", permuted[0], permuted[1], permuted[2], permuted[3], permuted[4]);
            }
            else perm(n+1);
            mark[i] = 0;
        }
    }
}
int main()
{
    perm(0);
    return 0;
}