wanna do a program that will print out what is going in a calculation. for eg. 300 *488 _____ so I basically want it printed out like how it would if I was doing it on paper

Answer 1

Oh, I didn't quite get it last time because I was using the website and carriage returns in title are ignored there.

Here you go:

http://code.sololearn.com/cNemf8rTyQdc

#include <iostream>
using namespace std;

int nbDigits(int n) {
int res = 0;
while (n != 0) {
res++;
n = n/10;
}
return res;
}

int max(int a, int b) {
if (a > b)
return a;
return b;
}

int main() {
int a, b, da, db, dres, i, maxd, res;
char op;
cout << "Please enter your operation: " << endl;
cin >> a >> op >> b;
switch (op) {
case '+':
res = a + b;
break;
case '-':
res = a - b;
break;
case '*':
res = a * b;
break;
case '/':
res = a / b;
break;
default:
cout << "Undefined operation" << endl;
return 1;
}
da = nbDigits(a);
db = nbDigits(b);
dres = nbDigits(res);
maxd = max(max(da, db)+1, dres);
for (i = 0; i < maxd-da; i++) {
cout << " ";
}
cout << a << endl;
cout << op;
for (i = 0; i < maxd-db-1; i++) {
cout << " ";
}
cout << b << endl;
for (i = 0; i < maxd; i++) {
cout << "_";
}
cout << endl;
for (i = 0; i < maxd-dres; i++) {
cout << " ";
}
cout << res << endl;
return 0;
}

Answer 2

you'll be doing some switching based off of peers of operations. the way I would do it is to have the user input the numbers as a string so you can choose which number to work with based off its location in the array. then convert that substring into an int with a stringstream and do the work on it with the second number. then just follow basic math rules and format ir. I'm sure there's better ways but that's what I can think of right now