简单的API应用

对于初学系统编程，了解下系统的API是必要的；

下面这个程序实现的是将自身程序复制到windows目录和系统目录；

 1 #include<stdio.h>
 2 #include<string.h>
 3 #include<windows.h>
 4 void copyself()
 5 {
 6     char selfpath[MAX_PATH]{0};
 7     char windowspath[MAX_PATH]{0};
 8     char systempath[MAX_PATH]{0};
 9     char tmppath[MAX_PATH]{0};
10     GetModuleFileName(NULL,selfpath,MAX_PATH);  //获取自身程序路径；
11     printf("self path is %s
",selfpath);
12     GetWindowsDirectory(windowspath,MAX_PATH);  //获取windows路径；
13     printf("windows path is %s
",windowspath);
14     GetSystemDirectory(systempath,MAX_PATH); // 获取系统路径；
15     printf("system path is %s
",systempath);
16     strcat(windowspath,"\test.exe");
17     strcat(systempath,"\test.exe");
18     CopyFile(selfpath,windowspath,true); //复制自身到windows路径；
19     CopyFile(selfpath,systempath,true);  //复制自身到系统路径；
20     return ;
21 }
22 
23 int main()
24 {
25     copyself();
26     return 0;
27 }