GnuDOS library version 1.0: hello_strings

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## 3 An example of using the strings utility

This is a sample program that demonstrates how to use the strings utility:

    #include <stdio.h>
    #include "strings.h"

    int main(int argc, char **argv) {
        printf("Hello World");
        str s;
        s = "Hello world";
        printf("\n%s", s);
        printf("\n%d", indexof(s, 'H'));
        printf("\n%d", nindexof('H'));
        printf("\n%d", lindexof(s, 'H'));
        printf("\n%s", substr(s, 4));
        printf("\n%s", nsubstr(s, 4, 5));
        return 0;
    }