Price fraction: Difference between revisions

=={{header|C++}}==

<lang C++>#include <iostream>

#include <cmath>

int main( ) {

double froms[ ] = { 0.00 , 0.06 , 0.11 , 0.16 , 0.21 , 0.26 ,

0.31 , 0.36 , 0.41 , 0.46 , 0.51 , 0.56 , 0.61 , 0.66 ,

0.71 , 0.76 , 0.81 , 0.86 , 0.91 , 0.96 } ;

double tos[ ] = { 0.06 , 0.11 , 0.16 , 0.21 , 0.26 , 0.31 ,

0.36 , 0.41 , 0.46 , 0.51 , 0.56 , 0.61 , 0.66 , 0.71 ,

0.76 , 0.81 , 0.86 , 0.91 , 0.96 , 1.01 } ;

double replacements [] = { 0.10 , 0.18 , 0.26 , 0.32 , 0.38 ,

0.44 , 0.50 , 0.54 , 0.58 , 0.62 , 0.66 , 0.70 , 0.74 ,

0.78 , 0.82 , 0.86 , 0.90 , 0.94 , 0.98 , 1.00 } ;

double number = 0.1 ;

std::cout << "Enter a fractional number between 0 and 1 ( 0 to end )!\n" ;

std::cin >> number ;

while ( number != 0 ) {

if ( ( number < 0 ) || ( number > 1 ) ) {

std::cout << "Error! Only positive values between 0 and 1 are allowed!\n" ;

return 1 ;

}

double integerpart = floor ( number ) ;

double remainder = number - integerpart ;

int n = 0 ;

while ( ! ( ( remainder >= froms[ n ] ) && ( remainder < tos[ n ] ) ) )

n++ ;

std::cout << "-->" << ( integerpart + replacements[ n ] ) << '\n' ;

std::cout << "Enter a fractional number ( 0 to end )!\n" ;

std::cin >> number ;

}

return 0 ;

}

</lang>

<pre>Sample output:

Enter a fractional number between 0 and 1 ( 0 to end )!

0.7

-->0.78

Enter a fractional number ( 0 to end )!

0.32

-->0.5

Enter a fractional number ( 0 to end )!

0.12

-->0.26

Enter a fractional number ( 0 to end )!

0

</pre>