Code:
//FileName: int_converter.c
//Author: Nyah Check, Chairman && CEO at INK Corp.
//Usage: This program converts numbers between 0 and a billion to words.
//INK Corp. 2012.
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#define MAX 10
int read_int(int *, int );
int analyse_print(int *, int);
int num[MAX];
int i;
//Main: This function calls two main functions; read_int, analyse_int; respectively.
int main(void)
{
printf("\nEnter a number between 1 and a billion for it to be converted to words.");
printf("\nEnter 'Q' to QUIT.");
for( ; ; )
{
read_int(num, MAX);
analyse_print(num, i);
}
return 0;
}
//read_int: This function reads the integers from input checks and stores them in an array.
int read_int(int num[], int n)
{
int ch;
i = 0;
printf("\nEnter number Here: ");
while( (ch = getchar())!= '\n')
{
if ( ch == 'Q' || ch == 'q')
{
printf("\nExiting....");
printf("\nThanks for using our software; we would like to receive your comments and suggestions to better our services.");
printf("\nINK Corp. 2012.");
exit(EXIT_SUCCESS);
}
else if ( i < n)
{
num[i++] = ch;
}
}
printf("\n%d\n", i);
return i;
}
//analyse_int: analyses the number to determine its range, hundred to million to billion. and prints the number in words.
int analyse_print(int num[], int m)
{
//These array contain the keywords that would be needed for the conversion.
char *sval[] = { " ", "One", "Two", "Three", "Four", "Five", "Six", "Seven", "Eight", "Nine"};
char *tval[] = {" " , "Eleven", "Twelve", "Thirteen", "Fourteen", "Fifteen", "Sixteen", "Seventeen", "Eighteen", "Nineteen"};
char *hval[] = {" " ," ","Twenty"," Thirty", "Forty", "Fifty","Sixty", "Seventy", "Eighty", "Ninety"};
char *nval[] = {"Hundred", "Thousand", "Million", "Billion"};
switch(m)
{
//This converts numbers between 1 to 10.
case 1: if (num[0] == 0)
{
printf("\nZero.");
}
else
printf("\n%s", sval[num[0]]);
break;
//This converts numbers between 10 and 99.
case 2: if ( num[0] == 1)
{
printf("\n%s", tval[num[1]]);
}
else
{
printf("\n%s %s", hval[num[0]],sval[num[1]]);
}
break;
//This converts numbers between 100 and 999.
case 3:
if ( num[1] == 1)
{
printf("\n%s hundred and %s", sval[num[0]], tval[num[2]]);
}
else
printf("\n%s hundred and %s %s", sval[num[0]], hval[num[1]], sval[num[2]]);
break;
//This converts between 1000 and 9999.
case 4: if ( num[2] == 1)
{
printf("\n%s Thousand %s hundred and %s ", sval[num[0]], sval[num[1]], tval[num[3]]);
}
else
printf("\n%s Thousand %s Hundred and %s %s ", sval[num[0]], sval[num[1]], hval[num[2]], num[3]);
break;
//10,000 and 99,999.....
case 5:
if ( num[0] == 1 && num[3] == 1)
{
printf("\n%s thousand %s hundred and %s.",tval[num[1]], sval[num[2]],tval[num[5]]);
}
else if ( num[0] == 1)
{
printf("\n%s Thousand %s Hundred and %s %s", tval[num[1]], sval[num[2]],nval[0], hval[num[3]], sval[num[4]]);
}
else if ( num[3] == 1)
{
printf("\n%s %s Thousand, %s Hundred and %s ", hval[num[0]], sval[num[1]], sval[num[2]],tval[num[4]]);
}
else
{
printf("\n%s %s Thousand, %s Hundred and %s %s ", hval[num[0]], sval[num[1]], sval[num[2]],hval[num[3]], sval[num[4]]);
}
break;
//100,000 and 999,999...
case 6: if ( num[1] == 1 && num[4] == 1)
{
printf("\n%s Hundred and %s Thousand, %s Hundred and %s ",sval[num[0]], tval[num[2]],sval[num[3]], tval[num[5]]);
}
else if ( num[1] == 1)
{
int j = num[2];
printf("\n%s Hundred %s thousand %s hundred and %s %s",sval[num[0]], tval[j], sval[num[3]], hval[num[4]], sval[num[5]]);
}
else if ( num[4] == 1)
{
printf("\n%s hundred %s %s thousand, %s hundred and %s ",sval[num[0]], hval[num[1]], sval[num[2]], sval[num[3]],tval[num[5]]);
}
else
{
printf("\n%s hundred and %s %s thousand, %s hundred and %s %s ",sval[num[0]], hval[num[1]], sval[num[2]], sval[num[3]],hval[num[4]], sval[num[5]]);
}
break;
//1,000,000 and 9,999,999.
case 7: if ( num[2] == 1 && num[5] == 1 )
{
printf("\n%s million, %s hundred and %s thousand, %s hundred and %s ", sval[num[0]], sval[num[1]], tval[num[3]], sval[num[4]], tval[num[6]]);
}
else if ( num[2] == 1)
{
printf("\n%s million,%s hundred and %s thousand, %s hundred and %s %s",sval[num[0]],sval[num[1]], tval[num[3]], sval[num[4]], hval[num[5]], sval[num[6]]);
}
else if ( num[5] == 1)
{
printf("\n%s %s,%s %s and %s %s %s, %s %s and %s ",sval[num[0]],nval[2],sval[num[1]], nval[0], hval[num[2]], sval[num[3]],nval[1], sval[num[4]],nval[0],tval[num[6]]);
}
else
{
printf("\n%s %s,%s %s and %s %s %s, %s %s and %s %s ",sval[num[0]], nval[2], sval[num[1]], nval[0], hval[num[2]], sval[num[3]],nval[1], sval[num[4]],nval[0],hval[num[5]], sval[num[6]]);
}
break;
//10,000,000 and 99,999,999....
case 8: if ( num[0] == 1 && num[3] == 1 && num[6] == 1)
{
printf("\n%s %s, %s %s and %s %s, %s %s and %s", tval[num[1]], nval[2], sval[num[2]], nval[0], tval[num[4]], nval[1], sval[num[5]], nval[0], tval[num[7]]);
}
else if ( num[0] == 1 && num[3])
{
printf("\n%s %s, %s %s and %s %s, %s %s and %s %s", tval[num[1]], nval[2], sval[num[2]], nval[0], tval[num[4]], nval[1], sval[num[5]], nval[0], hval[num[6]], sval[num[7]]);
}
else if ( num[0] == 1 && num[6] == 1)
{
printf("\n%s %s, %s %s and %s %s %s , %s %s and %s", tval[num[1]], nval[2], sval[num[2]], nval[0], hval[num[3]], sval[num[4]],nval[1], sval[num[5]],nval[0], tval[num[7]]);
}
else if ( num[0] == 1)
{
printf("\n%s %s, %s %s and %s %s %s, %s %s and %s %s ", tval[num[1]], nval[2], sval[num[2]], nval[0], hval[num[3]], sval[num[4]],nval[1], sval[num[5]],nval[0], hval[num[6]], sval[num[7]]);
}
else if ( num[3] == 1 && num[6] == 1)
{
printf("\n%s %s %s, %s %s and %s %s, %s %s and %s", hval[num[0]], sval[num[1]], nval[2], hval[num[2]], nval[0], tval[num[4]], nval[1],sval[num[5]], nval[0], tval[num[7]]);
}
else if ( num[3] == 1)
{
printf("\n%s %s %s, %s %s and %s %s, %s %s and %s %s", hval[num[0]], sval[num[1]], nval[2], hval[num[2]], nval[0], tval[num[4]],nval[1],sval[num[5]], nval[0], hval[num[6]], sval[num[7]]);
}
else if ( num[6] == 1)
{
printf("\n%s %s %s, %s %s and %s %s %s, %s %s and %s ", hval[num[0]], sval[num[1]], nval[2], hval[num[2]], nval[0], hval[num[3]], sval[num[4]], nval[1],sval[num[5]], nval[0], tval[num[7]]);
}
else
printf("\n%s %s %s, %s %s and %s %s %s, %s %s and %s %s ", hval[num[0]], sval[num[1]], nval[2], hval[num[2]], nval[0], hval[num[3]], sval[num[4]], nval[1],sval[num[5]], nval[0], hval[num[6]],sval[num[7]]);
break;
//100,000,000 and 999,999,999......
case 9: if ( num[1] == 1 && num[4] == 1 && num[7] == 1)
{
printf("\n %s %s and %s %s, %s %s and %s %s, %s %s and %s ", sval[num[0]], nval[0], tval[num[2]], nval[2], sval[num[3]],nval[0],tval[num[5]], nval[1], sval[num[6]], nval[0], tval[num[8]]);
}
else if( num[1] == 1 && num[4] == 1)
{
printf("\n%s %s and %s %s, %s %s and %s %s, %s %s and %s %s ", sval[num[0]], nval[0], tval[num[2]], nval[2], sval[num[3]], nval[0], tval[num[5]], nval[1], sval[num[6]], nval[0], hval[num[7]], sval[num[8]]);
}
else if ( num[1] == 1 && num[7] == 1)
{
printf("\n%s %s and %s %s, %s, %s and %s %s %s, %s %s and %s", sval[num[0]], nval[0], tval[num[2]], nval[2], sval[num[3]],nval[0],hval[num[4]], sval[num[5]], nval[1], sval[num[6]], nval[0], tval[num[8]]);
}
else if ( num [1] == 1)
{
printf("\n%s %s and %s %s, %s %s and %s %s %s, %s %s and %s %s", sval[num[0]], nval[0], tval[num[2]], nval[2], sval[num[3]],nval[0], hval[num[4]], sval[num[5]], nval[1], sval[num[6]], nval[0], hval[num[7]], sval[num[8]]);
}
else if ( num[4] == 1 && num[7] == 1)
{
printf("\n %s %s and %s %s %s, %s %s and %s %s, %s %s and %s ", sval[num[0]], nval[0], hval[num[1]], sval[num[2]], nval[2], sval[num[3]],nval[0], tval[num[5]], nval[1],sval[num[6]],nval[0], tval[num[8]]);
}
else if ( num[4] == 1)
{
printf("\n%s %s and %s %s %s , %s %s and %s %s, %s %s and %s %s ", sval[num[0]], nval[0], hval[num[1]], sval[num[2]], nval[2], sval[num[3]], nval[0], tval[num[5]],nval[1], sval[6], nval[0], hval[num[7]], sval[num[8]]);
}
else if ( num [7] == 1)
{
printf("\n%s %s and %s %s %s, %s %s and %s %s %s, %s %s and %s ", sval[num[0]], nval[0], hval[num[1]], sval[num[2]],nval[2], sval[num[3]],nval[0], hval[num[4]], sval[num[5]], nval[1], sval[num[6]], nval[0], tval[num[8]]);
}
else
printf("\n%s %s and %s %s %s, %s %s and %s %s %s, %s %s and %s %s",sval[num[0]], nval[0], hval[num[1]], sval[num[2]],nval[2], sval[num[3]],nval[0], hval[num[4]], sval[num[5]], nval[1], sval[num[6]], nval[0], hval[num[7]], sval[num[8]]);
break;
default: fprintf(stderr, "No value entered. Exiting now...");
exit (EXIT_FAILURE);
}
return 0;
}
