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

// demonstrate some string library functions

int main(int argc, char** argv) {
    char one[] = "rain";
    char two[] = "raid";
    char three[] = "rainy";
    char four[10];
    char five[35];
    
    // print length of three and contents of three
    printf("there are %d characters in %s\n", strlen(three), three);
    
    // copy one into four
    strcpy(four,one);
    printf("one: %s  four: %s\n", one, four);
    
    // strcmp returns 0 if they are equal, 0 is false, so this checks for equal 
    if (!strcmp(one,four))
        printf("%s == %s\n", one, four);
    else
        printf("%s != %s\n", one, four);
    
    // compare one ("rain") and three ("rainy")
    if (!strcmp(one,three))
        printf("%s == %s\n", one, three);
    else if (strcmp(one, three) < 0)
        printf("%s < %s\n", one, three);
    else
        printf("%s > %s\n", one, three);
    
    // compare one ("rain") and two ("raid")
    if (!strcmp(one,two))
        printf("%s == %s\n", one, two);
    else if (strcmp(one, two) < 0)
        printf("%s < %s\n", one, two);
    else
        printf("%s > %s\n", one, two);
    
    // copy one into five then concat two and three, then print
    strcpy(five, one);
    strcat(five, two);
    strcat(five, three);
    printf("five: %s\n", five);
    
    return (EXIT_SUCCESS);
}