Number To Words Converter in C

A simple number to words converter in C programming language.


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Program Listing

number_words.c

#include<string.h>

#include<stdio.h>

#include<conio.h>

#include<stdlib.h>

#include<math.h>

final_resort(long int num);

onebillion(long int x);

hundredmillion(long int x);

tenmillion(long int x);

onemillion(long int x);

hundredthou(long int x);

tenthou(long int x);

onethou(long int x);

hundred(long int x);

ten(long int x);

teen(int x);

one(int x);

char temp[200]=" ";

long int num;

void main(void)

{

printf("\t\t NUMBER TO WORDS CONVERTER IN C");

printf("\n\nGive a  Number: ");

scanf("%ld",&num);

printf("\n");

if (num<1412999999&&num>=1)

{

final_resort(num);

printf("In Words: %s",temp);

}

else if(num>=1412999999)

{

printf("\nError: Input Value must be less than 1,412,999,999!");

}

else {

printf("Error: Cannot convert the inputed value!" );

}

getch();

}

//last resort

final_resort(long int num)

{

char str1[20];

int lengs;

sprintf(str1,"%ld",num);

lengs=strlen(str1);

switch (lengs)

{

case 1:

one(num);

break;

case 2:

ten(num);

break;

case 3:

hundred(num);

break;

case 4:

onethou(num);

break;

case 5:

tenthou(num);

break;

case 6:

hundredthou(num);

break;

case 7:

onemillion(num);

break;

case 8:

tenmillion(num);

break;

case 9:

hundredmillion(num);

break;

case 10:

onebillion(num);

break;

}

}

//one

one(int x)

{

switch (x)

{

case 1:

strcat(temp,"one ");

break;

case 2:

strcat(temp,"two ");

break;

case 3:

strcat(temp,"three ");

break;

case 4:

strcat(temp,"four ");

break;

case 5:

strcat(temp,"five ");

break;

case 6:

strcat(temp,"six ");

break;

case 7:

strcat(temp,"seven ");

break;

case 8:

strcat(temp,"eight ");

break;

case 9:

strcat(temp,"nine ");

break;

}

}

//teens

teen(int x)

{

switch (x)

{

case 10:

strcat(temp,"ten ");

break;

case 11:

strcat(temp,"eleven ");

break;

case 12:

strcat(temp,"twelve ");

break;

case 13:

strcat(temp,"thirteen ");

break;

case 14:

strcat(temp,"fourteen ");

break;

case 15:

strcat(temp,"fifteen ");

break;

case 16:

strcat(temp,"sixteen ");

break;

case 17:

strcat(temp,"seventeen ");

break;

case 18:

strcat(temp,"eighteen ");

break;

case 19:

strcat(temp,"nineteen ");

break;

}

}

//ten

ten(long int x)

{

long int q,m;

q=x/10;

m=x%10;

switch (q)

{

case 2:

strcat(temp,"twenty ");

one(m);

break;

case 3:

strcat(temp,"thirty ");

one(m);

break;

case 4:

strcat(temp,"fourty ");

one(m);

break;

case 5:

strcat(temp,"fifty ");

one(m);

break;

case 6:

strcat(temp,"sixty ");

one(m);

break;

case 7:

strcat(temp,"seventy ");

one(m);

break;

case 8:

strcat(temp,"eighty ");

one(m);

break;

case 9:

strcat(temp,"ninety ");

one(m);

break;

}

if (x>=10&&x<=19)

{

teen(x);

}

else if (x>=1&&x<=9)

{

one(x);

}

}

//hundred

hundred(long int x)

{

long int q2,p2,d2;

q2=x/100;

p2=q2*100;

d2=x-p2;

switch (q2)

{

case 1:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 2:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 3:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 4:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 5:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 6:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 7:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 8:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

case 9:

one(q2);

strcat(temp,"hundred ");

ten(d2);

break;

}

if (q2<=0)

{

ten(x);

}

}

//thousands

onethou(long int x)

{

long int q1,p1,d1;

q1=x/1000;

p1=q1*1000;

d1=x-p1;

one(q1);

strcat(temp,"thousand ");

hundred(d1);

}

//tenthousands

tenthou(long int x)

{

long int q1,m;

q1=x/1000;

m=x%1000;

ten(q1);

strcat(temp,"thousand ");

hundred(m);

}

//hundredthousand

hundredthou(long int x)

{

long int q1,q2;

long int m1,m2;

q1=x/100000;

m1=x%100000;

one(q1);

strcat(temp,"hundred ");

q2=m1/1000;

m2=m1%1000;

ten(q2);

strcat(temp,"thousand ");

hundred(m2);

}

//one million

onemillion(long int x)

{

long int q1,q2;

long int m1,m2;

q1=x/1000000;

m1=x%1000000;

one(q1);

strcat(temp,"million ");

q2=m1/1000;

m2=m1%1000;

hundred(q2);

if (q2!=0)

{

strcat(temp,"thousand ");

}

hundred(m2);

}

//ten million

tenmillion(long int x)

{

long int q1,q2;

long int m1,m2;

q1=x/1000000;

m1=x%1000000;

ten(q1);

strcat(temp,"million ");

q2=m1/1000;

m2=m1%1000;

hundred(q2);

if (q2!=0)

{

strcat(temp,"thousand ");

}

hundred(m2);

}

//hundred million

hundredmillion(long int x)

{

long int q1,q2;

long int m1,m2;

q1=x/1000000;

m1=x%1000000;

hundred(q1);

strcat(temp,"million ");

q2=m1/1000;

m2=m1%1000;

hundred(q2);

if (q2!=0)

{

strcat(temp,"thousand ");

}

hundred(m2);

}

//onebillion

onebillion(long int x)

{

long int q1,q2,q3;

long int m1,m2,m3;

q1=x/1000000000;

m1=x%1000000000;

one(q1);

strcat(temp,"billion ");

q2=m1/1000000;

m2=m1%1000000;

hundred(q2);

if (q2!=0)

{

strcat(temp,"million ");

}

q3=m2/1000;

m3=m2%1000;

hundred(q3);

if (q3!=0)

{

strcat(temp,"thousand ");

}

hundred(m3);

}