c++ - I need some help formatting a file in an organized way -


i'm writing program update, delete , list tools hardware store in file. i'm able update , list tools in file in unorganized format on screen. here code output. give me idea on how format headers in file line more evenly? thanks. 

#include <iostream> #include <fstream> #include <string> #include "hardware.h" #include <iomanip>  using namespace std;  int main() {  int ch = 0, count=0, rno, qty;  string filename, h1, h2, h3, h4,hname;  double c;  ifstream infile;  ofstream outfile;  hardwaredata hwd[10];   cout<<endl<<endl<<"enter 1 opening data file."<<endl;  cout<<"enter 2 list records."<<endl;  cout<<"enter 3 add record."<<endl;  cout << "enter 4 delete entry."<<endl;   cout<<"enter 5 exit program."<<endl;   cout<<"choice: ";   cin>>ch;   while(ch!=5)  {       switch(ch)       {       case 1:           infile.open("hardware.dat");           if(!infile)                       break;       case 2:           {                               while(!infile.eof())                {                infile>>h1>>h2>>h3>>h4;                          cout<<h1<<"\t"<<h2<< "\t"<<h3<<"\t"<<h4 <<endl;                                  }           }           break;

this hardware.dat file 

record_num    tool_name   quantity    cost 3        electric sander    7       57.98 17          hammer          76      11.99 24          jig saw         21      11.00 39          lawn mower      3       79.50 56          power saw       18      99.99 68          screwdriver     106     6.99 77          sledge hammer   11      21.50 83          wrench          34      7.50

if use setw(n) adjust space taken each field space them correctly, provided n greater maximum number of characters in field.

i believe output auto aligned left, if not need add in std::left (or left since using namespace std).

while(!infile.eof()) {     infile>>h1>>h2>>h3>>h4;              cout << setw(10) << h1;     cout << setw(10) << h2;     cout << setw(10) << h3;     cout << setw(10) << h4;     cout << endl;           // cout <<h1<<"\t"<<h2<< "\t"<<h3<<"\t"<<h4 <<endl;                   }

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