Sample without replacement+intersect

[Francogrex]

Hi, I'm trying to sample without replacement some numbers (xons:70
values out of 1 to 200 and xEPS1cover:150 values out of 1 to 200).
Then I'm trying to intersect both samples to see how many are in
common. I have tried to write the code below, but I cannot seem to
sample without replacement (there are recurrent numbers within the
same sample, I don't want that) and I cannot either find the exact
intersection between the two samples. Can anyone please help or give
some hints. Thanks

#include <iostream>
#include <fstream>
using namespace std;

int main(){
ofstream osdis("dis.txt");
ofstream oscover("cover.txt");
srand(10);
int Ntot=200;
int Nons=70;
int i=0,j=0,r=0,t=0;
int xtot[200];
int xons[Ntot];
for (int i = 0; i < Ntot; i++){
xtot[i] = i;
}
for (int i = 0; i < Nons; i++) {
r = rand()%Ntot + 0;
t = xtot[r];
xtot[r] = xtot[i];
xons[i] = t;
}
int NEPS1cover=150;
int xEPS1cover[NEPS1cover];
for (int i = 0; i < NEPS1cover; i++) {
r = rand()%Ntot + 0;
t = xtot[r];
xtot[r] = xtot[i];
xEPS1cover[i] = t;
}
int R=0,u=0;
int xEPS1expected[NEPS1cover];
while(u<Nons){
int v=0;
while (v<NEPS1cover){
cout<<"dis: "<<xons[u]<<"\n";
cout<<"cover: "<<xEPS1cover[v]<<"\n";
if (xons[u]==xEPS1cover[v]){
printf("YES\n");
R=R+1;
}
v=v+1;
}
u=u+1;
}
for (j=0;j<Nons;j++) osdis<<xons[j]<<"\n";
for (i=0;i<NEPS1cover;i++) oscover<<xEPS1cover[i]<<"\n";
cout<<"R :"<<R<<"\n";
system("PAUSE");
return 0;
}

[Christopher]

On May 6, 8:23 am, Francogrex <[e-mail]:

Hi, I'm trying to sample without replacement some numbers (xons:70
values out of 1 to 200 and xEPS1cover:150 values out of 1 to 200).
Then I'm trying to intersect both samples to see how many are in
common. I have tried to write the code below, but I cannot seem to
sample without replacement (there are recurrent numbers within the
same sample, I don't want that) and I cannot either find the exact
intersection between the two samples. Can anyone please help or give
some hints. Thanks

#include <iostream>
#include <fstream>
using namespace std;

int main(){
ofstream osdis("dis.txt");
ofstream oscover("cover.txt");
srand(10);
int Ntot=200;
int Nons=70;
int i=0,j=0,r=0,t=0;
int xtot[200];
int xons[Ntot];
for (int i = 0; i < Ntot; i++){
xtot[i] = i;}

for (int i = 0; i < Nons; i++) {
r = rand()%Ntot + 0;
t = xtot[r];
xtot[r] = xtot[i];
xons[i] = t;}

int NEPS1cover=150;
int xEPS1cover[NEPS1cover];
for (int i = 0; i < NEPS1cover; i++) {
r = rand()%Ntot + 0;
t = xtot[r];
xtot[r] = xtot[i];
xEPS1cover[i] = t;}

int R=0,u=0;
int xEPS1expected[NEPS1cover];
while(u<Nons){
int v=0;
while (v<NEPS1cover){
cout<<"dis: "<<xons[u]<<"\n";
cout<<"cover: "<<xEPS1cover[v]<<"\n";
if (xons[u]==xEPS1cover[v]){
printf("YES\n");
R=R+1;}
v=v+1;
}
u=u+1;
}

for (j=0;j<Nons;j++) osdis<<xons[j]<<"\n";
for (i=0;i<NEPS1cover;i++) oscover<<xEPS1cover[i]<<"\n";
cout<<"R :"<<R<<"\n";
system("PAUSE");
return 0;

}

Add comments, document requirements and algorithm, use meaningful
variable and function names such that people can decipher your code
without spending an hour analyzing things like "what the hell is
NEPS1cover?" and "Whats a Nons?", "is there some reason a variable is
capitol R while others are lower case u and v? Is he trying to say
something there?". Glancing over the code as is, I don't have enough
kindness in my heart to try and figure it out and follow it.