#include<stdio.h>
#include<string.h>
#include<stdlib.h>

int main(){
   char a[20] = "hello ";
   char b[] = {'w','o','r','l','d','!','\0'};

   a[0]='H';
   char *c = strcat(a,b);
   printf("The string c is: %s\n", c);
   printf("The length of c is: %d\n", strlen(c));

   // find and replace the w with a W
   char *p = strchr(c,'w');  //pointer to first 'w' char
   *p = 'W';
   printf("The string c is now: %s\n", c);

   if (strcmp("cat", "dog")<=0){
      printf("cat comes before dog (lexiographically)\n");
   }
   //insert "to the" into middle of "Hello World!" string - messy!
   char *d = " to the";
   char *cd = malloc(strlen(c) + strlen(d));
   memcpy(cd, c, 5);
   memcpy(cd+5, d, strlen(d));
   memcpy(cd+5+strlen(d), c+5, 6);
   printf("The cd string is: %s\n", cd); 

   //tokenize cd string using spaces
   p = strtok(cd," ");
   while(p!=NULL){
      printf("Token:%s\n", p);
      p = strtok(NULL, " ");
   }
   return 0;
}