#include void fun 1 (char *s1, char *s2) { char *tmp; tmp = s1; s1 = s2; s2 = tmp; } Void fun2 (char **s1, char **s2) { char *tmp; tmp = s1; s1 = s2; s2 = tmp; } int main () { char *str1 = “Hi”, *str2 = “Bye”; fun1 (str1, str2); printf(“%s %s”, str1, str2); fun2 (&str1, &str2); printf(“%s %s”, str1, str2); return 0; }