簡單計算器

1 + 2 4 + 2 * 5 - 7 / 11 0 Sample Output
3.00 13.36
好久沒寫題了 寫個水題練練手感
getchar()的用法要注意
測試數(shù)據(jù) 0 + 1要注意一下 
#include<stdio.h>#include<stack>#include<algorithm>using namespace std;int main(){    stack<double> s;    int n;    while(~scanf("%d",&n)) {        char c;        c = getchar();        if(c=='/n' && n==0) {            break;        }        s.push(n);        c = getchar();        double m;        while(~scanf("%d",&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 == '-') {                n = -n;                s.push(n);            }            if(c=getchar() == '/n') {                break;            }            c = getchar();            }            double sum = 0;            while(!s.empty()) {                sum += s.top();                s.pop();        }        printf("%.2lf/n",sum);    }return 0;}