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Date: Sun, 06 Jun 2004 02:55:00 -0000
From: Naga Raju Thogiti <thogiti@aludra.usc.edu>
Subject: help needed
To: gcc-help@gcc.gnu.org
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Hi,
I am writing C++ program for displaying a table of tangents given the
lower and upper limits. The program initially rounds off ( e.g if one
enters 29.58 and 30.33, it rounds off it to 29.6 and 30.3), and output the
result in a table form. I have this problem with displaying the table
completely and correctly, it was challenging for me to figure out where
was I going wrong? Can you please help me out with it.

When I entered, 29.58 30.33 it stops at 30.2, for 32 34, it stops at 33.9
but when I entered 84.14 84.44 and 89.44 89.48 it gives me correct table.
I am enlcosing the code that I wrote.

Thanks,
Nagu

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#include <iostream.h>
#include <iomanip.h>
#include <math.h>

void main()
{
double min_Value, max_Value;
const double degtoRad = M_PI/180;
double diff;
int num_rows = 0;

cout<<"\n\n\t This program will generate tables of tangents.";
cout<<"\n\t (Enter a number >= 90 or < 0, or numbers in the wrong order, to terminate.)\n\n";

for (int i = 1;i<=10;i++)
{
 cout<<"\t ***";
}

cout<<"\n\n\t Minimum and maximum values for left column of table : ";
cin>>min_Value>>max_Value;


cout<<setiosflags(ios::fixed|ios::showpoint);

while(min_Value<=max_Value && min_Value>=0 && max_Value>=0 && min_Value<90 && max_Value<90)
{
 min_Value = floor(min_Value*10+0.5)/10.0;
 max_Value = floor(max_Value*10+0.5)/10.0;

 cout<<"\n\n\t\t\t\t Partial Table of Tangents";
 cout<<"\n\t\t ";

 for (int i = 0;i<=9;i++)
 {
  cout<<setw(8)<<i<<" ";
 }

 cout<<"\n\t";

 for (int j = 1;j<=100;j++)
 {
  cout<<"-";
 }

// cout<< "\n\t " << min_Value << " " << max_Value;
 while(min_Value <= max_Value)
 {
  cout<<"\n\t"<<setprecision(2)<<setw(8)<<min_Value<<"| ";

  for (int col = 0;col<=9;col++)
  {
   cout<<setprecision(4)<<setw(8)<<tan((min_Value + col*0.01)*degtoRad)<<" "; 
  }
  min_Value = min_Value+0.1;
 }

 //cout<<"\n\t "<<min_Value<<" "<<max_Value;
 min_Value = max_Value = 0;
 cout<<"\n\n\t Minimum and maximum values for left column of table : ";
 cin>>min_Value>>max_Value;
// num_rows = 0;

}
}



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