✅Exercise: Increment and Decrement

‎

‎1. int a=5;
‎  int  x=++a + ++a;
‎  cout<<x;
‎
‎
‎2. int a=5;
‎   int b=6;
‎   Cout<< ++a + b++;
‎   Cout<<b;
‎
‎3. int x, a, b, c;
‎a = 2;
‎b = 4;
‎c = 5;
‎x = a--+ b++ -++c;
‎cout<<x;
‎
‎4. int x, a;
‎a = 2;
‎x = ++a *--a *++a;
‎cout<<x;
‎
‎5. int x, a = 4;
‎x = ++a + ++a + ++a;
‎
‎cout<<x;
‎

@ProgrammingWithFaith2018
‎

✅ ‎Hint:‎One variable can't store two value at the same time.

‎
‎1.int a=5;
‎int x=++a + ++a;
‎(6+ ++a)
‎(7+7) because one variable can't hold two different value , (6 and 7 ) at the same time so it become 7.
‎
‎7+7=14
‎
‎

Answer 14

‎
‎2.int a=5;
‎   int b=6;
‎   
‎   Cout<<++a +b++// post and pre increment .
‎  6+6 // after this line b will be 7
‎Cout<<++a +b++;  (6+6)
‎  =12
‎Cout<<b;
‎=7
‎
‎

answer=12 and 7

‎
‎3.int x,a,b,c;
‎a=2;
‎b=4;
‎c=5;
‎x=a-- + b++ - ++c;
‎
‎(2+4)-6
‎=6-6=0
‎cout<<x;  
‎
‎

Answer   0

‎
‎4.int x,a;
‎a=2
‎x=++a *--a* ++a
‎(3*2) * ++a , but one variable can't hold two values at the same time.
‎
‎So, (2*2)*++a
‎    (4*3)=12
‎
‎cout<<x;// 12
‎
‎

Answer 12

‎
‎
‎5.int x,a=4;
‎x=++a + ++a + ++a;
‎
‎(++a + ++a) + ++a
‎(5+6) + ++a but we can't store two value at one variable at the same time.
‎
‎So,
‎(6+6)+ ++a
‎(12)+ 7
‎
‎

Answer 19

@ProgrammingWithFaith2018

If you ever find it difficult to understand questions and concepts like these, join our premium class. We make everything easy to understand for you.

✅For registration:[ @ProgrammingWithFaith_bot ]

🎲 Quiz 'C++ Chapter One'
🖊 16 questions · ⏱ 1 min

To register for the premium class, 👉 [@ProgrammingWithFaith_bot] 🎉

Do you have any questions? 🤔 Just ask me anonymously, and I will answer them here!💬😊
link: [ https://sma.robi.work/b/bqkJIHVlXiTl ]

u forgot to include return 0: and } 🤭

I recommend that u study based on the exam format, and to be good at programming, you should understand the theory first. Once you grasp how things work, it will become easier.

Computer Science

For now, I haven't built a very strong portfolio, but I can show you some of my projects.

https://movie-review-app-pi-two.vercel.app/

For more , you can join my personal channel where I share what I do. @SelfTaughtDev1

Do you have a Telegram channel? Are you already monetizing it? 🤔 Try Inside Ads — I’ve already started earning. Here’s the link:

https://t.me/InsideAds_bot/open?startapp=r_1876122021

✅Exercise

What is the output of this code? If there is an error, fix it and explain why it occurs.

#include <iostream>
using namespace std;


void add();

int main() {
    int age = 21;
    add();
    return 0;
}

void add() {
    cout << "Age: " << age << endl;
}

@ProgrammingWithFaith2018

#include <iostream>
using namespace std;

int age = 21;

void add() {
    cout << "Age: " << age << endl;
}

int main() {
    add();
    return 0;
}

Error: variable age is not local to the function ⚠️

This one is also possible ✅

#include <iostream>
using namespace std;
int age = 21;

void add();

int main() {
    add();
    return 0;
}

void add() {
    cout << "Age: " << age << endl;
}

Output: 21 🚀

@ProgrammingWithFaith2018

To register for the premium class, 👉 [@ProgrammingWithFaith_bot] 🎉

C++ mid exam @ProgrammingWithFaith2018