#include<bits/stdc++.h>

using namespace std;

int main(){
float a,b,h;

cin>>a>>b>>h;

cout<<"The tich cua hinh hop chu nhat là:"<<a*b*h<<endl;

return 0;}

$\color{red}{Best}$ $\color{red}{Answer}$

Code :

#include <iostream>

using namespace std;

double tinhTheTich(double a, double b, double h) {
    return a * b * h;
}

int main() {
    double chieuDai, chieuRong, chieuCao;

    cout << "Nhap chieu dai cua hinh hop chu nhat : ";
    cin >> chieuDai;
    cout << "Nhap chieu rong cua hinh hop chu nhat : ";
    cin >> chieuRong;
    cout << "Nhap chieu cao cua hinh hop chu nhat : ";
    cin >> chieuCao;

    double theTich = tinhTheTich(chieuDai, chieuRong, chieuCao);
    cout << "The tich cua hinh hop chu nhat la: " << theTich << " m^3" << endl;

    return 0;
}