Question

In C programing without using string  

Tooth fairy time.

This program will “pronounce” an ordinary sentence with a lisp. Prompt the user to enter a sentence. Read the characters, one at a time, until a period appears. As they are read, convert everything to lower case and test for occurrences of the character ’s’ and the pair "ss". Replace each ’s’ or "ss" by the letters ’t’ and ’h’. Print the converted message using putchar() or printf(). For example, given the sentence I see his house, the output would be I thee hith houthe.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#include<stdio.h>

#include<ctype.h>

int main(){

                //declaring two char variables

                char c=' ', temp;

                //asking for a sentence, terminated by a period

                printf("Enter a sentence terminated by a period: ");

                //looping as long as c is not '.'

                while(c!='.'){

                                //reading a character, converting to lower case

                                c=getchar();

                                c=tolower(c);

                                //checking if c is 's'

                                if(c=='s'){

                                               //reading next character, to see if it is also 's' (a pair)

                                               temp=getchar();

                                               temp=tolower(temp);

                                               //if it is not 's', pushing it back to the standard input (unreading it)

                                               if(temp!='s'){

                                                               ungetc(temp, stdin);

                                               }

                                               //printing 'th' instead of 's' or 'ss'

                                               putchar('t');

                                               putchar('h');

                                }else{

                                               //otherwise, printing the character as it is

                                               putchar(c);

                                }

                }

}

/*OUTPUT*/

Enter a sentence terminated by a period: I see hiss house.

i thee hith houthe.