Do you have a program that calculates C ++ system?

Question

ex)4+5*12+6/20

Answer 1

So you want to build a simple calculator.
Nope, I don't have any code for you.
But you seem good enough to write some on your own.

Answer 2

https://stackoverflow.com/questions/9329406/evaluating-arithmetic-expressions-from-string-in-c

Answer 3

Please explain us what you mean, it's not clear to us.

Answer 4

#include <iostream>

#include <string>

using namespace std;

int main() {

string s;

cout << "7+23+5+100+25." << endl;

getline(cin, s, '\n');

int sum = 0;

int startIndex = 0;

while(true) {

int fIndex = s.find('+', startIndex);

if(fIndex == -1) { 

string part = s.substr(startIndex);

if(part == "") break; 

cout << part << endl;

sum += stoi(part); 

break;

}

int count = fIndex - startIndex; 

string part = s.substr(startIndex, count); 

cout << part << endl;

sum += stoi(part);

startIndex = fIndex+1; 

}

cout << "answer " << sum;

}
this is plus code