/******************************************************************************
Pietro Baima
Number to letters ver 0.0
*******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
const char *zero[1]={"zero"};
const char *units[10] = {'\0',"uno","due","tre","quattro","cinque","sei","sette","otto","nove"};
const char *teens[10] = {"dieci","undici","dodici","tredici","quattordici","quindici","sedici","diciassette","diciotto","diciannove"};
const char *tens[10] ={'\0','\0',"venti","trenta","quaranta","cinquanta","sessanta","settanta","ottanta","novanta"};
const char *hundred[1]={"cento"};
int ntoITverbosen(int n, char* verbosen);
int ntoITverbosen(int n, char* verbosen) {
if (strlen(verbosen)==0 && n==0) {strcpy(verbosen, zero[0]);};
if (strlen(verbosen)!=0 && (n==1 || n==8) && verbosen[strlen(verbosen)-1]!='o') {verbosen[strlen(verbosen)-1]='\0';};
if (n>0 && n<10) {strcat(verbosen, units[n]);};
if (n>9 && n<20) {strcat(verbosen, teens[n-10]);};
if (n>19 && n<100) {strcat(verbosen, tens[n/10]);ntoITverbosen(n%10,verbosen);};
if (n>99 && n<1000) {if((n/100)!=1) strcpy(verbosen, units[n/100]);strcat(verbosen, hundred[0]);ntoITverbosen(n%100,verbosen);};
if (n>999) return (1); else return(0);
}
int main( int argc, char *argv[] ) {
unsigned int n;
char termcode;
char *verbosen = malloc(1000);
if( argc<2 ) { //no n
printf("Usage: %s n[0 to 999]\n",argv[0]);
return(2);}
strcpy(verbosen, "");
n=atoi(argv[1]);
if (n==-1)
{for (int m=1;m<1000;m++) {ntoITverbosen(m,verbosen);printf("%d is: %s\n",m,verbosen);strcpy(verbosen, ""); };termcode=0;}
else
{termcode=ntoITverbosen(n,verbosen);
if (!termcode) printf("%d is: %s\n",n,verbosen); else printf("huge number.\n");}
free(verbosen);
return(termcode);
}
