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  1. #include <bits/stdc++.h>
  2.  
  3. using namespace std;
  4.  
  5. const int MAX = 987654321;
  6.  
  7. int sum(char *s) /// 숫자 구하는 함수
  8. {
  9.     int cnt = 0, n = 1;
  10.     for(int i=1; i<strlen(s); i++) n *= 10;
  11.     for(int i=0; i<strlen(s); i++){
  12.         cnt += (s[i] - 48) * n;
  13.         n /= 10;
  14.     }
  15.     return cnt;
  16. }
  17. int main()
  18. {
  19.     ios::sync_with_stdio(false);
  20.     cin.tie(NULL);
  21.     cout.tie(NULL);
  22.  
  23.     int cnt = 0, ans = 0;
  24.     char num[5], s[51];
  25.     bool isMinus = false;
  26.  
  27.     cin >> s;
  28.     fill(num, num + 5, '\0');
  29.     for(int i = 0; i < strlen(s); i++){
  30.         if(48 <= s[i] && s[i] <= 57){
  31.             num[cnt++] = s[i]; /// 숫자를 저장하는 배열
  32.             continue;
  33.         }
  34.         /// 연산자일때
  35.         cnt = 0;
  36.         if(isMinus) ans -= sum(num);
  37.         else ans += sum(num);
  38.  
  39.         if(s[i] == '-')isMinus = true;
  40.         fill(num, num + 5, '\0');
  41.     }
  42.  
  43.     /// 마지막 수 처리
  44.     if(isMinus) ans -= sum(num);
  45.     else ans += sum(num);
  46.  
  47.     cout << ans;
  48.  
  49.     return 0;
  50. }
Success #stdin #stdout 0s 4700KB
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stdin
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99999
stdout
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1410065407
https://ideone.com/E9VjOH
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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