Usage of gettickcount function

GetTickCount is a Windows system function used to obtain the number of milliseconds that have elapsed since the system started. It is usually used to calculate program execution time or implement simple timing functions in the program.

GetTickCount is a Windows system function used to obtain the number of milliseconds that have elapsed since the system started. It is usually used to calculate program execution time or implement simple timing functions in the program.

The following is the basic usage of the GetTickCount function:

DWORD GetTickCount(void);
使用示例：
#include
#include
int main() {
DWORD start = GetTickCount(); // 获取当前毫秒数
// 执行一些需要计时的操作
// ...
DWORD end = GetTickCount(); // 再次获取毫秒数
DWORD elapsed = end - start; // 计算时间差
printf("Elapsed time: %d milliseconds\n", elapsed); // 打印执行时间
return 0;
}

In the above example, the GetTickCount function is used to measure the execution time within a certain period of time in the code, thereby helping with performance analysis or optimization .

It should be noted that GetTickCount The function returns the number of milliseconds that have passed since the system started. It should not be used as a precise time measurement tool because it is affected by the system timer and has certain accuracy limitations. For more precise time measurement and timing it is recommended to use High-precision timer functions such as QueryPerformanceCounter and QueryPerformanceFrequency.

In general, the GetTickCount function provides a simple method to get the number of milliseconds that have passed since the system started, which can be used for some simple time measurement and timing operations.

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