半云_ @ 2017-03-02 17:37:43
#include<cstdio>
#include<algorithm>
#include<math.h>
#include<cstring>
#include<iostream>
using namespace std;
char ch[1120];
int ans=0,top=0;
int heap[10000];
int main(){
gets(ch);
int i=0;
while(i<strlen(ch)-1){
if (ch[i]>='0' && ch[i]<='9'){
while(ch[i]!='.'){
ans+=ans*10+ch[i]-'0';
i++;
}
heap[++top]=ans;
ans=0;
}
else {
if (ch[i]=='+'){
int tt=heap[top]+heap[top-1];
top--;
heap[top]=tt;
}
if (ch[i]=='-'){
int tt=heap[top-1]-heap[top];
top--;
heap[top]=tt;
}
if (ch[i]=='*'){
int tt=heap[top]*heap[top-1];
top--;
heap[top]=tt;
}
if (ch[i]=='/'){
int tt=heap[top-1] / heap[top];
top--;
heap[top]=tt;
}
}
i++;
}
cout<<heap[top];
return 0;
}by 半云_ @ 2017-05-16 16:58:55
求大神
by JKPS @ 2017-07-17 14:42:28
#include<iostream>
#include<algorithm>
#include<cstdio>
#include<cstring>
#include<stack>
using namespace std;
char s[1010];
stack<int> st;
int main(){
char t='\0',ttt[200],pos=0;
int shu,t1,t2,tans;
while(t!='@')
{
t=getchar();
if(t>='0'&&t<='9')
{
ttt[pos++]=t;
continue;
}
else if(t=='.')
{
ttt[pos]='\0';pos=0;
sscanf(ttt,"%d",&shu);
st.push(shu);
continue;
}
else if(t!='@')
{
t1=st.top(); st.pop();
t2=st.top(); st.pop();
switch(t){
case '+':st.push(t2+t1);break;
case '-':st.push(t2-t1);break;
case '*':st.push(t2*t1);break;
case '/':st.push(t2/t1);break;
}
continue;
}
}
cout<<st.top();
return 0;
}