59 lines
2.2 KiB
Markdown
59 lines
2.2 KiB
Markdown
# GetTickCount64
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The GetTickCount64() function returns the number of milliseconds that have elapsed since the system was launched.
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```
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ulong GetTickCount64();
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```
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Return Value
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A ulong type value.
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Note
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The counter is limited to the accuracy of the system timer, which usually returns a result with the 10-16 millisecond precision. Unlike [GetTickCount](/en/docs/common/gettickcount), which is of [uint](/en/docs/basis/types/integer/integertypes) type and the contents of which overflow every 49.7 days in the case of continued computer operation, GetTickCount64() can be used for the unlimited computer operation time and is not subject to overflow.
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Example:
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```
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#define MAX_SIZE 40
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//+------------------------------------------------------------------+
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//| Script for measuring the time of calculating 40 Fibo numbers |
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//+------------------------------------------------------------------+
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void OnStart()
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{
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long fib_array[MAX_SIZE];
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//--- store the initial value
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ulong start=GetTickCount64();
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//--- a loop, in which we calculate a given number of numbers from the Fibo series
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for(int i=0;i<MAX_SIZE;i++)
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fib_array[i]=TestFibo(i);
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//--- get the spent time in milliseconds
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ulong time=GetTickCount64()-start;
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//--- display the error message in the Experts journal
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ArrayPrint(fib_array);
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PrintFormat("Calculating the first %d Fibonacci numbers took %I64u ms",MAX_SIZE,time);
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}
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//+------------------------------------------------------------------+
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//| Function for obtaining a Fibo number by its serial number |
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//+------------------------------------------------------------------+
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long TestFibo(long n)
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{
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//--- first member of the Fibo series
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if(n<2)
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return(1);
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//--- all subsequent members are calculated using this equation
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return(TestFibo(n-2)+TestFibo(n-1));
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}
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```
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See also
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[Date and Time](/en/docs/dateandtime), [EventSetMillisecondTimer](/en/docs/eventfunctions/eventsetmillisecondtimer), [GetTickCount](/en/docs/common/gettickcount), [GetMicrosecondCount](/en/docs/common/getmicrosecondcount)
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