/*
  Example about the utilization of strings and the string.h library
*/

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

#define N 20

int main(){
  char str1[N], str2[N], str3[]="abc";

  printf("STR3 : %s\n", str3);
  
  /*scanf("%s", str1);*/ /* Read only a word */
  gets(str1); /* Read the whole line */
  printf("STR1 : %s\n", str1);

  strcpy(str2, str1); /* Copy the content of str1 in str2 */
  printf("STR2 : %s\n", str2);
  printf("LEN  : %d\n", (int)strlen(str2)); /* strlen returns the length of a string */

  str2[3] = '\0'; /* Writes the end-of-string character '\0' in the position number 3 of the array of character. The string is truncated at position 2 (the resulting string is therefore formed by only 3 characters) */
  printf("STR2b: %s\n", str2 );

  if (strcmp(str1, str2)==0){ /* The function strcmp returns 0 if the two strings are equals, a value other than 0 if they are different (<0 if str1 is less than str2, >0 if str1 is greater than str2 */ 
    printf("str1 is equal to str2\n");
  }else{
    printf("str1 different from str2\n");
  }

  return 0;
}