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C 语言中打开文件的代码

Posted by haifeng on 2023-03-05 11:27:43 last update 2023-03-05 11:42:17 | Answers (0) | 收藏


 

FILE* inputFile;

const char * file_in;

if ((inputFile = fopen(file_in, "r")) == NULL)     //读取输入文件
{
printf("\nerror: 无法打开输入文件: %s\n\n", file_in);
std::cerr << "Parser: could not open input file '" << file_in << "'!\n";
return EXIT_FAILURE;
}

 

但若在 Visual Studio 下, 会提示 fopen 不安全, 建议使用 fopen_s.

//Declaring a variable of type errno_t to store the return value of fopen_s
    errno_t error_code1; 
    //Opening file in r mode
    error_code1 = fopen_s(&inputFile, file_in, "r");
    if (error_code1 != 0) {
        printf("Error! Failed to open file %s in r mode!", file_in);
    }