C ++ exercises have solutions (sample code) for variables, data types, and operators

In the previous C ++ exercises, TipsMake.com introduced, you were acquainted with many types of lessons, from simple to complex. In this C ++ exercise, we will become familiar with C ++ exercises on variables and data types in C ++.

C ++ exercises about variables and data types

Write a C ++ program to print the given text.

Exercise:

Write a C ++ program to print the following lines:

I'm 18 years old now.

I have a lot of people to follow.

Sample code:

 #include #include using namespace std; int main(int argc, char *argv[]) { int age; age=10; cout<<" Toi nam nay "<  

Write a C ++ program to print the asterisks as required.

Request:

Write a C ++ program to print asterisks in the following form:

*

**

***

****

*****

******

Sample code:

 #include #include using namespace std; int main(int argc, char *argv[]) { cout<<"*n"; cout<<"**n"; cout<<"***n"; cout<<"****n"; cout<<"*****n"; cout<<"******n"; return 0; } 

Write a C ++ program to declare two integer variables and a real variable, then print the results on the screen.

Request:

Write a C ++ program to declare two integer variables, a real variable and assign values ​​of 8, 16 and 15.8 to them. Then print the results on the screen.

Sample code:

 #include #include using namespace std; int main(int argc, char *argv[]) { int a; int b; float c; a=8; b=16; c=15.8; cout<<"a="<  

Writing a C ++ program requires the user to enter their name, and then print the results on the screen.

Request:

Write a C ++ program to prompt the user to enter their name, then print the results on the screen.

Sample code:

 #include #include using namespace std; int main(int argc, char *argv[]) { char name[20]; cout<<"Hay nhap ten cua ban:"; cin>>name; cout<<"Xin chao "<  

Write a C ++ program to enter the three known integers, then print to the screen in ascending and descending order.

Request:

Writing a C ++ program requires the user to enter three integers, then print those 3 numbers to the screen in ascending order.

Sample code:

 #include void Sort(int &a, int &b, int &c){ if(a>b){ int tmp = a; a = b; b = tmp; } if(a>c){ int tmp = a; a=c; c = tmp; } if(b>c){ int tmp = b; b=c; c=tmp; } return; } int main(){ std::cout << "Nhap 3 so nguyen: " << std::endl; int num1; int num2; int num3; std::cin >> num1 >> num2 >> num3; int output1 = num1; int output2 = num2; int output3 = num3; Sort(output1,output2,output3); std::cout << num1 << " " << num2 << " " << num3 << " " << " khi sap xep tang dan: "; std::cout << output1 << " " << output2 << " " << output3 << std::endl; return 0; } 

Write a C ++ program to print an integer, a real number, a predefined character.

Request:

Print the following values ​​on the standard screen: An integer a, a real number b and a character c.

Sample code:

 #include #include using namespace std; int main() { int a = 100; float b = 5.1; char c = 'q'; cout << "a = " << a << endl; cout << "b = " << b << endl; cout << "c = " << c << endl; return 0; } 

C ++ exercises on operators

Find the sum, effect, volume and quotient of the two integers and print the results to the screen.

Request:

Suppose there are two given integers, calculate the sum, effect, volume and quotient of the two numbers and print the results on the screen.

Sample code:

 #include #include using namespace std; int main() { int x = 12; int y = 5; int tong, hieu, tich, thuong; tong = x + y; hieu = x - y; tich = x * y; thuong = x / y; cout << "Tong cua " << x << " va " << y << " la " << tong << "." << endl; cout << "Hieu cua " << x << " va " << y << " la " << hieu << "." << endl; cout << "Tich cua " << x << " va " << y << " la " << tich << "." << endl; cout << "Thuong cua " << x << " va " << y << " la " << thuong << "." << endl; return 0; } 

Enter two integers from the keyboard, calculate their sum, average and print to the screen.

Request:

Enter two integers from the keyboard, calculate the sum, the average of the two numbers, and then print the results to the screen.

Sample code:

 #include #include using namespace std; int main() { int x,y,tong; float trungbinhcong; cout << "Nhap hai so nguyen : " << endl; cin>>x>>y; tong=x+y; trungbinhcong=tong/2.0f; cout << "Tong cua " << x << " va " << y << " la " << tong << "." << endl; cout << "Trung binh cong cua " << x << " va " << y << " la " << trungbinhcong << "." << endl; return 0; } 

Result:

 Nhap hai so nguyen: 
 3 
 5 
 Tong cua 3 va 5 la 8. 
 Trung binh cong cua 3 va 5 la 4. 

Find the final velocity and print the results to the screen when knowing the initial velocity, acceleration and time.

Request:

Suppose an automobile has initial velocity v ₀ , acceleration a and time t. Write a C ++ program to find the final speed of the car and print the results to the screen.

Suggestions:

• Use the cin command to enter the corresponding values ​​for v ₀ , a and t.
• Use the formula v = v ₀ + at to calculate the final velocity

Sample code:

 #include #include using namespace std; int main() { int v,u,a,t; cout << "Nhap van toc v0, gia toc a, thoi gian t: " << endl; cin>>u>>a>>t; v=u+a*t; cout << "Van toc cuoi cung la " << v << "." << endl; return 0; } 

Result:

 Nhap van toc v0, gia toc a, thoi gian t: 
 10 2 15 
 Van toc cuoi cung la 40. 

Write a C ++ program to calculate expression values ​​and print results as required.

Request:

Write a C ++ program to print the results as follows:

Gtri x Gtri y Bieu Thieu Thuc Ket 18 | 2 | A = y + 3 | A = 5 18 | 2 | B = y-2 | B = 0 18 | 2 | C = y * 5 | C = 10 18 | 2 | D = x / y | D = 9 18 | 2 | E = x% y | E = 0

Suggestions:

• Use tabs and newlines to print on demand.

Sample code:

 #include #include using namespace std; int main(int argc, char *argv[]) { int x; int y; x=18; y=2; cout<<"Ket qua tra ve:n"; cout<<"Gtri xt"<<"Gtri yt"<<"Bieu thuct"<<"Ket quan"; cout<  

Result:

Write a C ++ program to calculate test scores.

Request:

Write a program to enter midterm test scores, test scores, final exam scores, then calculate the total score and print the results to the screen as follows:

Sample code:

 #include #include #include using namespace std; int main(int argc, char *argv[]) { float q1; float q2; float q3; float tongdiemkt; float diemgk; float diemck; float tongdiem; cout<<"==========Diem kiem tra================n"; cout<<"Nhap diem kiem tra 1:"; cin>>q1; cout<<"n"; cout<<"Nhap diem kiem tra 2:"; cin>>q2; cout<<"n"; cout<<"Nhap diem kiem tra 3:"; cin>>q3; cout<<"n"; cout<<"==========Diem thi giua ky=============n"; cout<<"Nhap diem thi giua ky:"; cin>>diemgk; cout<<"n"; cout<<"===========Diem thi cuoi ky=============n"; cout<<"Nhap diem thi cuoi ky:"; cin>>diemck; cout<<"n"; tongdiemkt=q1+q2+q3; tongdiem=tongdiemkt+diemgk+diemck; cout<<"Tong diem kiem tra:"<  

Result:

Enter 2 x and y numbers and calculate as required

Request:

Write a C ++ program to enter two integers x, y, then calculate: p = x * y, s = x + y, q = s ² + p (sx) * (p + y) and print the results to the screen form.

Sample code:

 #include #include #include using namespace std; int main(int argc, char *argv[]) { float x; float y; float p; float s; float q; cout<<"Nhap gia tri x: "; cin>>x; cout<<"n"; cout<<"Nhap gia tri y: "; cin>>y; cout<<"n"; p=x*y; s=x+y; q=s*s+p*(sx)*(p+y); cout<<"Gia tri bieu thuc q la: "<  

Result:

 Nhap gia tri x: 5 
 
 Nhap gia tri y: 10 
 
 Gia tri bieu thuc q la: 30225 

C ++ exercises use the overloading of binary operators to add and subtract two complex numbers

Request:

Use the concept of overloading operators to add and subtract two complex numbers.

Suggestions:

To use operator overloading in this addition and subtraction problem, you need to do the following:

• Declaring the sophuc class: Include variables and member functions

• Use the getvalue () function to get the real part, the virtual part of the complex number

• Define operator + () function to add two complex numbers

• Define operator- () function to subtract two complex numbers

• Definition of display function

• Declare complex numbers i1, i2 and calculation results kq1, kq2

• Call the getvalue function to get the real part and the virtual part for i1, i2

• Call the function operator + () and operator- () to add and subtract two complex numbers

• Calling the display function to display 2 complex numbers, 2 results plus and minus

• Returns values

Sample code:

 #include #include using namespace std; class sophuc { int a,b; public: void getvalue() { cout<<"Hãy nhập phần thực, phần ảo:"; cin>>a>>b; } sophuc operator+(sophuc i) { sophuc q; qa=a+ia; qb=b+ib; return(q); } sophuc operator-(sophuc i) { sophuc q; qa=ai.a; qb=bi.b; return(q); } void display() { cout<  

Result: