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  1. #include <iostream>
  2. #include <string>
  3. #include <sstream>
  4.  
  5. std::string nexttime(std::string nowtime) {
  6.   std::string hs, ms, ss;
  7.   std::istringstream nowstream(nowtime);
  8.   std::getline(nowstream, hs, ':');
  9.   std::getline(nowstream, ms, ':');
  10.   std::getline(nowstream, ss);
  11.   int h = std::stoi(hs);
  12.   int m = std::stoi(ms);
  13.   int s = std::stoi(ss);  
  14.   /*-------------------------*/
  15.   s++;
  16.   if (s >= 60) { m++; s = 0; }
  17.   if (m >= 60) { h++; m = 0; }
  18.   if (h >= 24) h = 0;
  19.   /*-------------------------*/
  20.   hs = (hs = "0" + std::to_string(h)).substr(hs.size() - 2);
  21.   ms = (ms = "0" + std::to_string(m)).substr(ms.size() - 2);
  22.   ss = (ss = "0" + std::to_string(s)).substr(ss.size() - 2);
  23.   return hs + ":" + ms + ":" + ss;
  24. }
  25.  
  26. void f(std::string sin) {
  27.   std::cout << sin << std::endl;
  28.   std::cout << nexttime(sin) << std::endl << std::endl;
  29. }
  30.  
  31. int main() {
  32.   f("00:00:00");
  33.   f("23:59:59");
  34.  
  35.   f("00:03:59");
  36.   f("15:59:59");
  37.  
  38.   return 0;
  39. }
  40. /* end */
  41.  
Success #stdin #stdout 0.01s 5276KB
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stdin
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Standard input is empty
stdout
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00:00:00
00:00:01

23:59:59
00:00:00

00:03:59
00:04:00

15:59:59
16:00:00
https://ideone.com/eUBv44
language:
C++14 (clang 8.0)
created:
105 days ago
visibility:
secret

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