func_code_string: #include <bits/stdc++.h>   using namespace std;   char a[100001];   int n, f = 1, x, ans;   int main() {     cin >> a;     n = strlen(a);     for (int i = 0; i < n; i++) {       if (a[i] <  0  || a[i] >  9 ) {         ans += x * f;         x = 0;         if (a[i] ==  - ) f = -1;         if (a[i] ==  + ) f = 1;         x = x * 10 + a[i] -  0 ;       }       if (a[i] >=  0  && a[i] <=  9 ) {         x *= 10;         x += a[i] -  0 ;       }     }     ans += x * f;     cout << ans;     return 0;   }   