编辑代码

#include<iostream>
#include<cstdio>
#include<string>
using namespace std;
string s;
int num(int &x){
    int summ=0;
    summ+=s[]
    while(s[x])
}
int main(){
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    cin>>s;
    int k,a,b,d=1;
    for(int i=0;i<s.size();i++){
        if(s[i]=='=') d=-1;
        if(s[i]>='0'&&s[i]<='9') =num(i); 
    }
    return 0;
}