Create a file: Difference between revisions
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(→{{header|C}}: +Windows) |
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=={{header|C}}== |
=={{header|C}}== |
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=== ISO C === |
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ISO C (directory creation not supported): |
ISO C (directory creation not supported): |
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<lang c>#include <stdio.h> |
<lang c>#include <stdio.h> |
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}</lang> |
}</lang> |
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POSIX |
=== POSIX === |
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{{works with|POSIX}} |
{{works with|POSIX}} |
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(for creation in the filesystem root, replace the filenames by "/output.txt" and "/docs") |
(for creation in the filesystem root, replace the filenames by "/output.txt" and "/docs") |
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=== Windows API === |
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First, a solution with the C runtime functions <code>_creat</code> and <code>_mkdir</code>. |
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<lang c>#include <direct.h> |
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#include <io.h> |
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#include <sys/stat.h> |
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int main(void) { |
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int f; |
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f = _creat("output.txt", _S_IWRITE); |
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if (f == -1) { |
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perror("Unable to create file"); |
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} else { |
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_close(f); |
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} |
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if (_mkdir("docs") == -1) { |
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perror("Unable to create directory"); |
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} |
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f = _creat("\\output.txt", _S_IWRITE); |
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if (f == -1) { |
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perror("Unable to create file"); |
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} else { |
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_close(f); |
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} |
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if (_mkdir("\\docs") == -1) { |
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perror("Unable to create directory"); |
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} |
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return 0; |
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}</lang> |
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Another solution with the kernel32 API functions <code>CreateFile</code> and <code>CreateDirectory</code>. |
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<lang c>#include <windows.h> |
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#include <stdio.h> |
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int main(void) { |
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HANDLE hFile; |
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hFile = CreateFile("output.txt", GENERIC_WRITE, 0, NULL, |
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CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); |
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if (hFile == INVALID_HANDLE_VALUE) { |
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printf("Unable to create file\n"); |
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} else { |
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CloseHandle(hFile); |
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} |
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if (CreateDirectory("docs", NULL) == 0) { |
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printf("Unable to create directory\n"); |
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} |
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hFile = CreateFile("\\output.txt", GENERIC_WRITE, 0, NULL, |
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CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); |
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if (hFile == INVALID_HANDLE_VALUE) { |
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printf("Unable to create file\n"); |
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} else { |
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CloseHandle(hFile); |
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} |
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if (CreateDirectory("\\docs", NULL) == 0) { |
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printf("Unable to create directory\n"); |
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} |
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return 0; |
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}</lang> |
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=={{header|C sharp|C#}}== |
=={{header|C sharp|C#}}== |
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