1237 简单计算器

#include<iostream>#include<cstdio>#include<cstring>#include<stack>#include <algorithm>using namespace std;int main(){double n,m;char c;while(scanf("%lf",&n)){ c=getchar();if(c=='\n'||n==0)break;stack<double> s;s.push(n);   scanf("%c",&c);while(scanf("%lf",&n)){   if(c=='*')   {     m=s.top();     m*=n;     s.pop();     s.push(m);            }   if(c=='/')  {    m=s.top();    m/=n;    s.pop();    s.push(m);          }           if(c=='+')   s.push(n);  if(c=='-')  s.push(0-n);  if(getchar()=='\n')break;c=getchar();}double sum=0;while(!s.empty()){sum+=s.top();s.pop(); }printf("%0.2lf\n",sum);}return 0;}