#include <iostream>
#include <fstream>  //Provides input and output classes
using namespace std;
 
int main()
{
 
 
ifstream HAPLOin("HaploTb.txt");
if (!HAPLOin)
        {
        cout << "File not found.\n";
        cout << "Press enter to exit.\n"; getchar();
        return 0;
        }
 
const int Haplos=10;
const int Pops=4;
 
char Header [10][80]={""};
char IDname[Pops][Haplos]={""};
int Haplo[Pops][Haplos]={0};
 
int r1=0;
int c1=0;
int r2=0;
int c2=0;
int r3=0;
int c3=0;
int z=0;
int i=0;
int j=0;
char ch='a';
                                //counter for # of variable sites
 
while (HAPLOin.get(ch) && z<2)
        {
        if (ch=='>')
          {z++;}    // get data while loop
 
        if (z==1 && ch!='>' && ch!='\t')
          {Header[r1][c1]=ch; c1++;}
 
        if (ch==10 && z==1)
          {r1++; c1=0;}
        }
 
IDname[i][j]=ch;
j++;
 
while (HAPLOin.get(ch))
{
  while (HAPLOin.get(ch) && ch!=10)
        {
 
        if (ch!='>' && ch!='\t')
          {IDname[r2][c2]=ch; c2++;}
        }
r2++;
c2=0;
  while (HAPLOin.get(ch) && ch!=0)
        {
        if (ch!='>' && ch!='\t' && ch!='0')
          {Haplo[r3][c3]=ch; c3++;}
        }
r3++;
c3=0;
}
 
cout << "next\n\n";
 
 
for(r1=0;r1<Pops;r1++)
  for(c1=0;c1<80;c1++)
       if (Header[r1][c1]!=0)
       {cout << Header[r1][c1];}
cout << "\n\n";
for(r1=0;r1<Pops;r1++)
  for(c1=0;c1<80;c1++)
        if (IDname[r1][c1]!=0)
        {cout << IDname[r1][c1] << " ";}
cout << "\n\n";
for(r1=0;r1<Pops;r1++)
  for(c1=0;c1<80;c1++)
        if (Haplo[r1][c1]!=0)
        {cout << Haplo[r1][c1] << " ";}
cout << "\n\n";
 
getchar();
        return 0;
}

char nm[] = "123";
int n = 0;
for(i = 0; nm[i]; ++i)
  n = (n * 10) + nm[i] - '0';

char nm[] = "123";
int n = 0;
sscanf(nm,"%d",&n);

#include <stdlib.h>
int main(void)
{
     char *buf1 = "42";
     char buf2[] = "69.00";
     int i;
     double d;
     long l;
     i = atoi(buf1);
     l = atol(buf1);
     d = atof(buf2);
     return 0;
}

string n;
in >> n;
int num = atoi(n.c_str());