chuyen sang c++ tuongtaylorThiên tài03/09/2020 uses crt; var n,a,b,c:real; begin clrscr; writeln('MOI BAN CHON HINH CAN TINH DIEN TICH: '); writeln('1. Hinh vuong.'); writeln('2. Hinh chu nhat.'); writeln('3. Hinh tron.'); writeln('4. Hinh tam giac.'); writeln('5. Hinh thang.'); readln(n); if n=1 then begin write('Canh:');readln(a); writeln('Dien tich: ',a*a:0:2); end else if n=2 then begin write('Chieu dai:');readln(a); write('Chieu rong:');readln(b); writeln('Dien tich: ',a*b:0:2); end else if n=3 then begin write('Ban king:');readln(a); writeln('Dien tich: ',a*a*3.14:0:2); end else if n=4 then begin write('Duong cao:');readln(a); write('Day:');readln(b); writeln('Dien tich: ',a*b/2:0:2); end else if n=5 then begin write('Day tren:');readln(a); write('Day duoi:');readln(b); write('Duong cao:');readln(c); writeln('Dien tich: ',c/2*(a+b):0:2); end; readln end.

#include <iostream>

using namespace std;

int main() {

float n, a, b, c;

cout << "MOI BAN CHON HINH CAN TINH DIEN TICH: " << endl;

cout << "1. Hinh vuong." << endl;

cout << "2. Hinh chu nhat." << endl;

cout << "3. Hinh tron." << endl;

cout << "4. Hinh tam giac." << endl;

cout << "5. Hinh thang." << endl;

cin >> n;

if (n == 1) { cout << "Canh: ";

cin >> a;

cout << "Dien tich: " << a * a << endl;

} else if (n == 2) {

cout<< "Chieu dai: ";

cin >> a;

cout << "Chieu rong: ";

cin >> b;

cout << "Dien tich: " << a * b << endl;

} else if (n == 3) {

cout << "Ban king: ";

cin >> a;

cout << "Dien tich: " << a * a * 3.14 << endl;

} else if (n == 4) {

cout << "Duong cao: ";

cin >> a;

cout << "Day: ";

cin >> b;

cout << "Dien tich: " << (a * b) / 2 << endl;

} else if (n == 5) {

cout << "Day tren: ";

cin >> a;

cout << "Day duoi: ";

cin >> b;

cout<< "Duong cao: ";

cin >> c;

cout << "Dien tich: " << (c / 2) * (a + b) << endl;

}

return 0;

}

#include <iostream>
using namespace std;

int main() {
    float n, a, b, c;

    cout << "MOI BAN CHON HINH CAN TINH DIEN TICH: " << endl;
    cout << "1. Hinh vuong." << endl;
    cout << "2. Hinh chu nhat." << endl;
    cout << "3. Hinh tron." << endl;
    cout << "4. Hinh tam giac." << endl;
    cout << "5. Hinh thang." << endl;
    cin >> n;

    if (n == 1) {
        cout << "Canh: ";
        cin >> a;
        cout << "Dien tich: " << a * a << endl;
    } else if (n == 2) {
        cout << "Chieu dai: ";
        cin >> a;
        cout << "Chieu rong: ";
        cin >> b;
        cout << "Dien tich: " << a * b << endl;
    } else if (n == 3) {
        cout << "Ban kinh: ";
        cin >> a;
        cout << "Dien tich: " << 3.14 * a * a << endl;
    } else if (n == 4) {
        cout << "Duong cao: ";
        cin >> a;
        cout << "Day: ";
        cin >> b;
        cout << "Dien tich: " << (a * b) / 2 << endl;
    } else if (n == 5) {
        cout << "Day tren: ";
        cin >> a;
        cout << "Day duoi: ";
        cin >> b;
        cout << "Duong cao: ";
        cin >> c;
        cout << "Dien tich: " << (c / 2) * (a + b) << endl;
    } else {
        cout << "Lua chon khong hop le." << endl;
    }

    return 0;
}