View Compilation Error

0_0_37560479_17051.cpp:65:1: error: 'clock_t' does not name a type
 clock_t startTime, testTime;
 ^
0_0_37560479_17051.cpp: In function 'double getCurrentTime()':
0_0_37560479_17051.cpp:66:49: error: 'clock' was not declared in this scope
 double getCurrentTime() { return (double)(clock() - startTime) / CLOCKS_PER_SEC; }
                                                 ^
0_0_37560479_17051.cpp:66:53: error: 'startTime' was not declared in this scope
 double getCurrentTime() { return (double)(clock() - startTime) / CLOCKS_PER_SEC; }
                                                     ^
0_0_37560479_17051.cpp:66:66: error: 'CLOCKS_PER_SEC' was not declared in this scope
 double getCurrentTime() { return (double)(clock() - startTime) / CLOCKS_PER_SEC; }
                                                                  ^
0_0_37560479_17051.cpp: In function 'int main()':
0_0_37560479_17051.cpp:242:2: error: 'startTime' was not declared in this scope
  startTime = clock();
  ^
0_0_37560479_17051.cpp:242:20: error: 'clock' was not declared in this scope
  startTime = clock();
                    ^