Answer:
#include <iostream>
#include <string>
#include <regex>
using namespace std;
int main()
{
cout << "Enter a 5-digit number: ";
string number;
cin >> number;
bool valid = regex_search(number, regex("^\\d{4}[02468]$"));
if (valid) {
valid = stoi(number.substr(0, 1)) + stoi(number.substr(1, 1))
< stoi(number.substr(3, 1)) + stoi(number.substr(4, 1));
}
cout << number << (valid ? " is valid" : " is invalid");
}
Explanation:
Regular expressions can do all of your checking except for the sum of digits check. The checks are i.m.o. easiest if you don't treat the input as a number, but as a string with digits in it.
The regex means:
^ start of string
\d{4} exactly 4 digits
[02468] one of 0, 2, 4, 6 or 8 (this is what makes it even)
$ end of string
Answer:
"Option B" is the correct answer to this question.
Explanation:
Technological progress involves the development of print head arrays and numerous carrying structures to covering a wider area of the tissue in one pass of the substratum. In this technology, an external shift of PPF implies, that even an economy can create all products more effectively, that's why other options were wrong, that can be described as follows:
- Option A, and Option E, is wrong because all opportunities can't increase or decrease the overall cost.
- In option C, In is wrong, because the PPF shift can't be inward.
- In option D, It is incorrect, because It can't move to the midpoint.
Square shape have the code circle (100, steps=4) draw.
A. square
<u>Explanation:</u>
This circle function code is done in Python. The circle function is available in turtle module. In python turtle module is used for graphics. We have to import turtle module in IDLE and call the function Turtle() to open the turtle graphics screen.
Then we can call the function circle() which takes 100 as radius and step size as parameter into the function and resulting in drawing a square of 100 radius. The square is drawn tilted due to the movement of the turtle(the arrow head).
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