CPP
cpp
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#include <iostream>
using namespace std;
int main () {
double a,b;
char op;
cin>>a;
b=a;
while(true) {
cin>>op;
if (op=='=') {
cout <<"result = "<<b;
exit (0);
}
cin>>a;
switch (op) {
case '-':
b-=a;
break;
case '+':
b+=a;
break;
case '*':
b*=a;
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OUTPUT
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