Removing consecutive Zeros

 
/*Remove all two consecutive zeros in the given string.

 Example: a3409jd00dk000d

 Output: a3409jddk000d

 Note: If there are less/more than two consecutive zeros, they should not be replaced.

 */



void remove2zeros(char *input) {
 char *temp = input;

 while (*temp != '\0') {
  if (*temp == '0' && *(temp - 1) != '0' && *(temp + 1) == '0'
    && *(temp + 2) != '0') {
   temp = temp + 2;
  } else {
   if (input != temp) {
    *input++ = *temp++;
   } else {
    temp++;
    input++;
   }
  }
 }
 *input = '\0';
}