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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. int string2sec(const std::string& str) {
  6.   int i = 0;
  7.   int res = -1;
  8.   int tmp = 0;
  9.   int state = 0;
  10.  
  11.   while(str[i] != '\0') {
  12.     // If we got a digit
  13.     if(str[i] >= '0' && str[i] <= '9') {
  14.       tmp = tmp * 10 + str[i] - '0'; // Little bug fix here
  15.     }
  16.     // Or if we got a colon
  17.     else if(str[i] == ':') {
  18.       // If we were reading the hours
  19.       if(state == 0) {
  20.         res = 3600 * tmp;
  21.       }
  22.       // Or if we were reading the minutes
  23.       else if(state == 1) {
  24.         res += 60 * tmp;
  25.       }
  26.       // Or if we were reading the seconds
  27.       else if(state == 2) {
  28.         res += tmp;
  29.       }
  30.       // Or we got an extra colon
  31.       else {
  32.         return -1;
  33.       }
  34.  
  35.       state++;
  36.       tmp = 0;
  37.     }
  38.     // Or we got something wrong
  39.     else {
  40.       return -1;
  41.     }
  42.     i++;
  43.   }
  44.  
  45.   return res;
  46. }
  47. int main() {
  48. 	std::cout << string2sec("1:01:01") << std::endl;
  49. 	return 0;
  50. }
Success #stdin #stdout 0s 3428KB
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https://ideone.com/V1VbFa
language:
C++14 (gcc 8.3)
created:
12 years ago
visibility:
public

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