HTML parser exercise

                

                        #include <stdio.h>
                        #include <string.h>
                        
                        void parser(char *string)
                        {
                            int in = 0; // variable to track whether we are inside the tag
                            int index = 0;
                            for (int i = 0; i < strlen(string); i++)
                            {
                                if (string[i] == '<')
                                {
                                    in = 1; // won't collect
                                    continue;
                                }
                                else if (string[i] == '>')
                                {
                                    in = 0;
                                    continue;
                                }
                                if(in==0)
                                {
                                    //we are inside the string between tags
                                    string[index]=string[i]; //modifying the same string.
                                    index ++;
                                }
                            }
                            string[index]='\0';
                            //now we have to remove the trailing spaces  from the begining
                            while(string[0]==' ')
                            {
                                //shift the string to the left
                                for(int j=0;j<strlen(string);j++)
                                {
                                    string[j]=string[j+1];
                                }
                            }
                             //now we have to remove the trailing spaces  from the end
                             while(string[strlen(string)-1]==' ')
                             {
                                string[strlen(string)-1] ='\0';
                             }
                        }
                        
                        int main()
                        {
                            char string[] = "<h1>     this is a heading     </h1>";
                            parser(string);
                            printf("The parsed string is ~~%s~~", string);
                            return 0;
                        }