feat: initial commitHEADmain

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diff --git a/chapter1/temperature.cxx b/chapter1/temperature.cxx
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+// File: temperature.cxx

+// This program prints a table to convert numbers from one unit to another.

+// The program illustrases some implementation techniques.

+

+#include <iostream>    // Provides cout

+#include <iomanip>     // Provides setw function for setting output width

+#include <cstdlib>     // Provides EXIT_SUCCESS

+#include <cassert>     // Provides assert function

+using namespace std;   // Allows all standard library items to be used

+

+double celsius_to_fahrenheit(double c)

+// Precondition: c is a Celsius temperature no less than absolute

+// zero (-273.16).

+// Postcondition: The return value is the temperature c converted to Fahrenheit

+// degrees.

+{

+    const double MINIMUM_CELSIUS = -273.16; // Absolute zero in Celsius degrees

+    assert(c >= MINIMUM_CELSIUS);

+    return (9.0 / 5.0) * c + 32;  

+}

+

+void setup_cout_fractions(int fraction_digits)

+// Precondition: fraction_digits is not negative.

+// Postcondition: All double or float numbers printed to cout will now be

+// rounded to the specified digits on the right of the decimal.

+{

+    assert(fraction_digits > 0);

+    cout.precision(fraction_digits);

+    cout.setf(ios::fixed, ios::floatfield);

+    if (fraction_digits == 0)

+        cout.unsetf(ios::showpoint);

+    else

+        cout.setf(ios::showpoint); 

+}

+

+int main( )

+{

+    const char   HEADING1[]  = "   Celsius"; // Heading for table's 1st column

+    const char   HEADING2[]  = "Fahrenheit"; // Heading for table's 2nd column

+    const char   LABEL1      =          'C'; // Label for numbers in 1st column

+    const char   LABEL2      =          'F'; // Label for numbers in 2nd column

+    const double TABLE_BEGIN =        -50.0; // The table's first Celsius temp.

+    const double TABLE_END   =         50.0; // The table's final Celsius temp.

+    const double TABLE_STEP  =         10.0; // Increment between temperatures

+    const int    WIDTH       =            9; // Number chars in output numbers

+    const int    DIGITS      =            1; // Number digits right of decimal pt

+

+    double value1;  // A value from the table's first column

+    double value2;  // A value from the table's second column

+    

+    // Set up the output for fractions and print the table headings.

+    setup_cout_fractions(DIGITS);

+    cout << "CONVERSIONS from " << TABLE_BEGIN << " to " << TABLE_END << endl;

+    cout << HEADING1 << "  " << HEADING2 << endl;

+    

+    // Each iteration of the loop prints one line of the table.

+    for (value1 = TABLE_BEGIN; value1 <= TABLE_END; value1 += TABLE_STEP) 

+    {   

+        value2 = celsius_to_fahrenheit(value1);

+        cout << setw(WIDTH) << value1 << LABEL1 << "  "; 

+        cout << setw(WIDTH) << value2 << LABEL2 << endl; 

+    }

+

+    return EXIT_SUCCESS;

+}