没 `#include <vector>`
by tder @ 2023-11-20 21:22:48
@[tder](/user/714254) 感谢解答
刚才又排查几遍，加上这一行也是能过编译了但是还是RE
翻了翻一些讨论感觉可能是getline的问题，刚才写了一个不用getline的就AC了（
```cpp
# include <cstdio>
# include <iostream>
# include <sstream>
# include <string>
using namespace std;
struct problem {
string symbol;
int a, b;
string sa, sb;
} p[50];
int str2int(string str) {
int n;
istringstream iss;
iss.clear();
iss.str(str);
iss>>n;
return n;
}
int len(int n) {
int ans = 0;
if (n < 0) {
ans ++;
n = -n;
}
if (n > 0) {
while (n) {
n /= 10;
ans ++;
}
} else {
ans ++;
}
return ans;
}
int n;
string ch;
int main() {
scanf("%d", &n);
getchar();
for (int i = 0; i < n; i ++) {
cin>>ch;
int a = 0, b = 0;
if (ch[0] >= 'a' && ch[0] <= 'c') {
cin>>a>>b;
p[i].symbol = ch;
} else {
a = str2int(ch);
cin>>b;
p[i].symbol = p[i - 1].symbol;
}
p[i].a = a;
p[i].b = b;
}
for (int i = 0; i < n; i ++) {
string symbol = p[i].symbol;
int a = p[i].a, b = p[i].b;
string sa = p[i].sa, sb = p[i].sb;
if (symbol == "a") {
cout<<a<<'+'<<b<<'='<<a + b<<endl;
cout<<len(a) + len(b) + 2 + len(a + b)<<endl;
} else if (symbol == "b") {
cout<<a<<'-'<<b<<'='<<a - b<<endl;
cout<<len(a) + len(b) + 2 + len(a - b)<<endl;
} else if (symbol == "c") {
cout<<a<<'*'<<b<<'='<<a * b<<endl;
cout<<len(a) + len(b) + 2 + len(a * b)<<endl;
}
}
return 0;
}
```
by eofitg @ 2023-11-20 22:35:49