if(access(file_name, F_OK ) != -1) {//file exists}else{//file doesn't exist} You can also useR_OK,W_OK, andX_OKin place ofF_OKto check for read permission, write permission, and execute permission (respectively) rather than existence, and you can OR any of them together (i.e...
#include <Shlwapi.h> //Windows API PathFileExists #pragma comment(lib, "shlwapi.lib") int main(void) { if(PathFileExists("setting.ini")){ printf("load custom setting...\n"); }else{ printf("setting file missing,load default..\n"); } return 0; } 1. 2. 3. 4. 5. 6. 7. 8...
C语言判断文件是否存在(转) int access(const char *filename, int amode); amode参数为0时表示检查文件的存在性,如果文件存在,返回0,不存在,返回-1。 这个函数还可以检查其它文件属性: 06 检查读写权限 04 检查读权限 02 检查写权限 01 检查执行权限 00 检查文件的存在性 在UNIX和VC下实验成功。 好处是 ...
1、判断文件夹是否存在 //spath：文件夹路径名 using System.IO; if (Directory.Exists(spath...
{/*Check for existence*/if( (_access("ACCESS.C",0)) != -1) { printf("File ACCESS.C exists");/*Check for write permission*/if( (_access("ACCESS.C",2)) != -1) printf("File ACCESS.C has write permission"); } } 输出:>>File ACCESS.C exists.>>File ACCESS.C has write perm...
在这个示例中,file(EXISTS "path/to/file.txt" file_exists)命令用于检查指定路径下的文件是否存在,结果将保存在file_exists变量中。然后使用if语句根据结果输出不同的提示信息。 检查文件在构建过程中非常常见,可以用于判断一些必要的配置文件、依赖库等是否存在,从而保证项目的正常构建和运行。 推荐的腾讯云相关产品:...
CREATE TABLE IF NOT EXISTS STUDENT(Sno integer primary key, Sname text not null, Ssex text,Sage integer check(Sage>14),Sdept text default 'CS'); 该表的属性就是按照上一节表属性 执行结果: 查看表: 看到STUDENT,说明该表创建好了。【注意】 ...
[DEBUG] = "DEBUG",};static char file_names[LOGFILE_MAXCOUNT][LOGFILE_NAMELENTH];//记录文件名前缀(最好取自终端编号)static char file_prifix[LOGFILE_NAMELENTH];//linux消息队列static int s_msg_id;static int r_msg_id;#define MSG_TYPE 1001#define MAX_TEXT 1024struct msg_st{long int msg_...
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INCLUDE (CheckCXXSourceRuns) INCLUDE (CheckSymbolExists) # WITH_PIC options.Not of much use, PIC is taken care of on platforms # where it makes sense anyway. IF(UNIX) IF(APPLE) # OSX executable are always PIC SET(WITH_PIC ON) ELSE() OPTION(WITH_PIC "Generate PIC objects...