int ran1;
int ran2;
int ran3;

for(int k=0;k<3;k++)
 ran%k=k; // this is wrong ,but i am looking for the correct way .
          //output should be :ran1=0 ran2=1 ran3=2..

int ran[3];

for (int k = 0; k < 3; k++)
{
    ran[k % 3] = k;
}

int ran1, ran2, ran3;

int *rans[3] = { &ran1, &ran2, &ran3 };

for (int k = 0; k < 3; k++)
  *rans[k] = k;

int ran[3];
for(int k=0;k<3;k++)
 ran[k]=k;

ran[k % 3] = k;