In C++ Write an going to use a simplified notation X to mean X2. For example, 10
ID: 3750933 • Letter: I
Question
In C++
Write an going to use a simplified notation X to mean X2. For example, 10 7 - 51A should mean 102 7-512 Example: When reading input file formulas.txt calculator program calc3.cpp that can understand squared numbers. We are 5A; 1000 6 - 5A 1; the program should report: $. ./calc3 formulas"txt 25 1012 A hint: To take into account , don't add or subtract new numbers right away after reading them. Instead, remember the number, read the next operator and if it is a,square the remembered number, then add or subtract it.Explanation / Answer
/* program */
#include<iostream>
#include<fstream>
using namespace std;
int main(int argc, char** argv)
{
char old_opr='+',new_opr;
int number,ans=0;
ifstream file;
file.open(argv[1]);
while(file>>number)
{
file>>new_opr;
if(new_opr=='^')
{
number*=number;
file>>new_opr;
}
if(old_opr=='+')
{
ans+=number;
}
else if(old_opr=='-')
{
ans-=number;
}
if(new_opr==';')
{
cout<<ans<<endl;
ans=0;
new_opr='+';
}
old_opr=new_opr;
}
return 0;
}
/* output
formula.txt file
5^;
1000+6^-5^+1;
after running
./a.out formula.txt
25
1012
*/