latihan CPP 4.5

#include <iostream>
using namespace std;
#include <stdio.h>

/*
Nama : La ode ian
Nim  : 3420210002
prodi: teknik informatika
*/

void garis(){
    printf("\n--------------------------------------------");
}

void ttd(){
    garis();
    printf("\nla ode ian");
    printf("\n3420021002");
    printf("\ninformatika");
}
int main() {   // default return type of main in c++ is int
    int nilai;
    printf("Input nilai matakuliah: "); scanf("%i", &nilai);

    if (nilai >= 85 && nilai <= 100) {
        printf("\nLULUS"); printf("\nGRADE A");
    }

    if (nilai >= 75 && nilai < 85) {
        printf("\nLULUS"); printf("\nGRADE B");
    }

    if (nilai >= 60 && nilai < 75) {
        printf("\nLULUS"); printf("\nGRADE C");
    }

    if (nilai >= 45 && nilai < 60) {
        printf("\nGAGAL"); printf("\nGRADE D");
    }

    if (nilai >= 0 && nilai < 45) {
        printf("\nGAGAL"); printf("\nGRADE E");
    }

    if (nilai < 0 || nilai > 100) {
        printf("\nInput nilai antara 0-100");
    }
    ttd();

    return 0;
}