 _fsopen参数说明 #include
     
       _fsopen 共享模式访问文件//安全性比fopen高_fsopen　　以共享的方式打开文件或者流　　FILE *_fsopen( 　　const char *filename, 　　const char *mode, 　　int shflag 　　); 　filename 　Name of the file to open. 　//需要打开的文件名mode 　　Type of access permitted. 　//可以访问的类型shflag 　　Type of sharing allowed. 　//共享访问类型　_SH_COMPAT 　　Sets Compatibility mode for 16-bit applications. //以兼容模式打开16位程序　_SH_DENYNO 　　Permits read and write access. 　//充许读和写  以此模式打开类似fopen　_SH_DENYRD 　　Denies read access to the file. 　//拒绝读　_SH_DENYRW 　　Denies read and write access to the file. 　 //拒绝读和写　_SH_DENYWR 　　Denies write access to the file   //拒绝写#include 
      
        int main(void){        FILE *f1,*f2;     char s1[256],s2[256];     //同时打开文件读取     /*f1=fopen("share.txt","r");     f2=fopen("share.txt","r");*/     f1=f2=NULL;     f1=_fsopen("share.txt","r",_SH_DENYRW);//独占文件访问wb        // f2=_fsopen("share.txt","r",_SH_DENYRW);          if (!f1)     {         perror("打开出错");     }else     {         fgets(s1,256,f1);         printf("%s \n",s1);     }      fclose(f1);     f2=fopen("share.txt","r");     if (!f2)     {         perror("打开出错");     }else     {         fgets(s2,256,f2);         printf("%s \n",s2);     }     //关掉指针         fclose(f2);    getchar();    getchar();    return 0;}