Question

1) Tinh dien tich (S) va do dai duong cheo (d) cua hinh chu nhat, biet chieu dai (a) va chieu rong (b) la cac so nguyen nho hon 100

Answer 1

#include <bits/stdc++.h>

using namespace std;

int main()

{

float a,b,s,d;

cin>>a>>b;

d=sqrt(a*a+b*b);

s=a*b;

cout<<"Do dai duong cheo la:"<<fixed<<setprecision(2)<<d<<endl;

cout<<"Dien tich la:"<<fixed<<setprecision(2)<<s;

return 0;

}

Answer 2

#include <iostream>
using namespace std;
int main()
{
int n;
double S;
cin >> n;
for(int i=1; i<=n; i++)
    S+=1.0/i;
    cout << double(S) << endl;
return 0;
}

Chúc bn học tốt!