Write a program to remove extra spaces and punctuation from a sentence using C?

Question

Given a sentence and a word, remove all occurrences of the word in the sentence.

For example, removing “is” from the sentence “This is a boy.” becomes “Th a boy.”

Answer 1

int main(int argc, char *argv[])
{
   unsigned char indx = 0;

   if (argc != 3)
   {
      printf("Invalid No. of arguments passed");
      return 0;
   }

   char result[255] = {'\0'};
   char *input = argv[1];
   char rmchar = *argv[2];

   while(*input)
   {
      if (*input != rmchar)
      {
         result[indx++] = *input;
      }
      input++;
   }

   printf("%s",result);

   return 0;
}

This code is working and giving expected result.
input - $ ./a.out abcd:abcd:abcd :
output - $abcdabcdabcd
Here punctuation is semicolon :