I am learning c

i just started watching a c tutorial by bro code because i wanna learn here is a program i just made earlier ```c // c langauge basic one user login system #include <stdio.h> #include <string.h> #include <stdlib.h> char login(char input_user[], char input_password[], char user[], char pass[]) { if (strcmp(input_user, user) == 0 && strcmp(input_password, pass) == 0) { return printf("\n\nWelcome, %s!\n\n", user); } else { system("clear"); return printf("invalid login details.\n"); } } int main() { char input_user[800]; char input_pass[800]; char user[] = "username"; char pass[] = "password"; printf("\n\nusername: "); scanf("%s", &input_user); printf("\npassword: "); scanf("%s", &input_pass); login(input_user, input_pass, user, pass); }``` if anyone has any learning tips please lmk.