C Program To Convert Number To Words

Learn How To Convert Number To Words in C Programming Language. This C Code for Integer to Words Conversion makes use of Switch Case to set the String according to the Digit that it fetched. Every Digit in the Number is fetched by the Modulus Operator.

The Modulus Operator is used to fetch the Last Digit of the Number entered by the User. The Division Operator is used to Remove the Last Digit of the Number.

Also Read: C Program To Find Narcissistic Numbers

C Program To Convert Number To Words using Switch Case

#include<stdio.h>

int main()

{

int count = 0, j, temp, number;

char * word_string[1000];

printf("Enter A Number:\t");

scanf("%d", &number);

while(number)

{

temp = number%10;

number = number/10;

switch(temp)

{

case 0: word_string[count++] = "Zero";

break;

case 1: word_string[count++] = "One";

break;

case 2: word_string[count++] = "Two";

break;

case 3: word_string[count++] = "Three";

break;

case 4: word_string[count++] = "Four";

break;

case 5: word_string[count++] = "Five";

break;

case 6: word_string[count++] = "Six";

break;

case 7: word_string[count++] = "Seven";

break;

case 8: word_string[count++] = "Eight";

break;

case 9: word_string[count++] = "Nine";

break;

}

for(j = count - 1; j >= 0; j--)

{

printf("\n%s\n\n", word_string[j]);

}

return 0;

}

Also Read: C Program To Encrypt and Decrypt Text Files

Output

C Program To Convert Number To Words using Switch Case

If you have any doubts or compilation errors in this C Program To Convert Numbers to Words, let us know about it in the Comment Section below.

3 thoughts on “Convert Number To Words C Program”

Bob March 16, 2016

“Coding Alpha – Understanding Code Better!”

as per ISO/IEC 9899:201x (C Standard)

5.1.2.2.1 Program startup

1 The function called at program startup is named main. The implementation declares no prototype for this function. It shall be defined with a return type of int and with no parameters:

1 2	int main(void) { /* ... */ }

or with two parameters (referred to here as argc and argv, though any names may be used, as they are local to the function in which they are declared):
int main(int argc, char argv[]) { / … */ }
or equivalent;(10) or in some other implementation-defined manner.
2 If they are declared, the parameters to the main function shall obey the following constraints:

The value of argc shall be nonnegative.
argv[argc] shall be a null pointer.
If the value of argc is greater than zero, the array members argv[0] through argv[argc-1] inclusive shall contain pointers to strings, which are given implementation-defined values by the host environment prior to program startup. The intent is to supply to the program information determined prior to program startup from elsewhere in the hosted environment. If the host environment is not capable of supplying strings with letters in both uppercase and lowercase, the implementation shall ensure that the strings are received in lowercase.
If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment. If the value of argc is greater than one, the strings pointed to by argv[1] through argv[argc-1] represent the program parameters.
The parameters argc and argv and the strings pointed to by the argv array shall be modifiable by the program, and retain their last-stored values between program startup and program termination.

(10) Thus, int can be replaced by a typedef name defined as int, or the type of argv can be written as char ** argv, and so on.

5.1.2.2.3 Program termination

1 If the return type of the main function is a type compatible with int, a return from the initial call to the main function is equivalent to calling the exit function with the value returned by the main function as its argument;(11) reaching the } that terminates the main function returns a value of 0. If the return type is not compatible with int, the termination status returned to the host environment is unspecified.

(11) In accordance with 6.2.4, the lifetimes of objects with automatic storage duration declared in main will have ended in the former case, even where they would not have in the latter.

im sure void main() is right because it compiles but it is used in embedded systems, so if you want to make people “understand code better” you should make sure the code is correct!

Reply ↓

Tushar Soni Post authorJuly 31, 2016
Thank you so much for your time! The value you’re providing through your comment is really good!
Reply ↓

Pankaj Dhende May 9, 2016

Thanks for such easy programs.

Reply ↓

Bob March 16, 2016
“Coding Alpha – Understanding Code Better!”
as per ISO/IEC 9899:201x (C Standard)
5.1.2.2.1 Program startup
1 The function called at program startup is named main. The implementation declares no prototype for this function. It shall be defined with a return type of int and with no parameters:
1
2
int main(void) { /* ... */ }

or with two parameters (referred to here as argc and argv, though any names may be used, as they are local to the function in which they are declared):
int main(int argc, char argv[]) { / … */ }
or equivalent;(10) or in some other implementation-defined manner.
2 If they are declared, the parameters to the main function shall obey the following constraints:
The value of argc shall be nonnegative.
argv[argc] shall be a null pointer.
If the value of argc is greater than zero, the array members argv[0] through argv[argc-1] inclusive shall contain pointers to strings, which are given implementation-defined values by the host environment prior to program startup. The intent is to supply to the program information determined prior to program startup from elsewhere in the hosted environment. If the host environment is not capable of supplying strings with letters in both uppercase and lowercase, the implementation shall ensure that the strings are received in lowercase.
If the value of argc is greater than zero, the string pointed to by argv[0] represents the program name; argv[0][0] shall be the null character if the program name is not available from the host environment. If the value of argc is greater than one, the strings pointed to by argv[1] through argv[argc-1] represent the program parameters.
The parameters argc and argv and the strings pointed to by the argv array shall be modifiable by the program, and retain their last-stored values between program startup and program termination.
(10) Thus, int can be replaced by a typedef name defined as int, or the type of argv can be written as char ** argv, and so on.
5.1.2.2.3 Program termination
1 If the return type of the main function is a type compatible with int, a return from the initial call to the main function is equivalent to calling the exit function with the value returned by the main function as its argument;(11) reaching the } that terminates the main function returns a value of 0. If the return type is not compatible with int, the termination status returned to the host environment is unspecified.
(11) In accordance with 6.2.4, the lifetimes of objects with automatic storage duration declared in main will have ended in the former case, even where they would not have in the latter.
im sure void main() is right because it compiles but it is used in embedded systems, so if you want to make people “understand code better” you should make sure the code is correct!
Reply ↓
1. Tushar Soni Post authorJuly 31, 2016
  Thank you so much for your time! The value you’re providing through your comment is really good!
  Reply ↓
Pankaj Dhende May 9, 2016
Thanks for such easy programs.
Reply ↓

Convert Number To Words C Program