悬赏关注|然额样例都没过(STL)

P1449 后缀表达式

a2lyaXNhbWUgbWFyaXNh @ 2022-07-18 09:27:24

由于本人患有重度STL依赖症，所以用的是STL中的Stack，并没有手打栈，结果样例会输出一个4位数，帮忙看一下哪错了%%%

by a2lyaXNhbWUgbWFyaXNh @ 2022-07-18 09:27:48

代码：

#include<bits/stdc++.h>
using namespace std;
char s[100];
int tmp,opnmX,opnmY;
stack<int> line;
int main(){
    scanf("%s",s);
    for(int i=0;i<strlen(s)-1;i++){
        if(s[i]>='0'&&s[i]<='9'){
            tmp=tmp*10+s[i]-'0';
        }else if(s[i]=='.'){
            line.push(tmp);
        }else{
            switch(s[i]){
                case '+':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY+opnmX);
                    break;
                case '-':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY-opnmX);
                    break;
                case '*':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY*opnmX);
                    break;
                case '/':   
                opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY/opnmX);
                    break;
            }
        }
    }
    printf("%d",line.top());
    return 0;
}

by 喵仔牛奶 @ 2022-07-18 09:53:21

#include<bits/stdc++.h>
using namespace std;
char s[100];
int tmp,opnmX,opnmY;
stack<int> line;
int main(){
    scanf("%s",s);
    for(int i=0;i<strlen(s)-1;i++){
        if(s[i]>='0'&&s[i]<='9'){
            tmp=tmp*10+s[i]-'0';
        }else if(s[i]=='.'){
            line.push(tmp),tmp=0;
        }else{
            switch(s[i]){
                case '+':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY+opnmX);
                    break;
                case '-':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY-opnmX);
                    break;
                case '*':
                    opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY*opnmX);
                    break;
                case '/':   
                opnmX=line.top();
                    line.pop();
                    opnmY=line.top();
                    line.pop();
                    line.push(opnmY/opnmX);
                    break;
            }
        }
    }
    printf("%d",line.top());
    return 0;
}

by 喵仔牛奶 @ 2022-07-18 09:53:42

@S__B tmp要清零