算法训练 前缀表达式

#include <cstdio>#include <algorithm>using namespace std;char s[5];int a,b;int main(){scanf ("%s%d%d",s,&a,&b);if (s[0]=='+') printf ("%d",a+b);else if (s[0]=='-') printf ("%d",a-b);else if (s[0]=='*') printf ("%d",a*b);else printf ("%d",a/b);return 0;}