49 lines
1.0 KiB
C++
49 lines
1.0 KiB
C++
#include <bits/stdc++.h>
|
||
|
||
using namespace std;
|
||
|
||
char a[1010101];//KAO,第一次下手不够狠，居然RE了两个点！！
|
||
queue<string> q1;
|
||
queue<char> q2;
|
||
|
||
int main() {
|
||
scanf("%s", a);
|
||
string s1 = "", s2 = "";
|
||
|
||
for (int i = 0; a[i] != '\0';) {
|
||
//数字
|
||
while (a[i] >= '0' && a[i] <= '9') {
|
||
s1 += a[i];
|
||
i++;
|
||
}
|
||
if (s1.size() > 0) {
|
||
q1.push(s1);
|
||
s1.clear();
|
||
}
|
||
//操作符
|
||
if (a[i] == '+' || a[i] == '-') {
|
||
q2.push(a[i]);
|
||
i++;
|
||
}
|
||
}
|
||
long result;
|
||
//字符串转数字长整型
|
||
istringstream(q1.front()) >> result;
|
||
q1.pop();
|
||
|
||
while (!q1.empty()) {
|
||
long second;
|
||
istringstream(q1.front()) >> second;
|
||
q1.pop();
|
||
char c = q2.front();
|
||
q2.pop();
|
||
|
||
if (c == '+') {
|
||
result += second;
|
||
} else {
|
||
result -= second;
|
||
}
|
||
}
|
||
cout << result << endl;
|
||
return 0;
|
||
} |