Check that file exists: Difference between revisions

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===Using C++ 17===
===Using C++ 17===
C++ 17 contains a Filesystem library which significantly improves manipulations with files.
C++ 17 contains a Filesystem library which significantly improves operations with files.
<syntaxhighlight lang="c++">
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int main() {
int main() {
file_exists("C:/input.txt");
file_exists("input.txt");
file_exists("C:/zero_length.txt");
file_exists("zero_length.txt");
file_exists("C:/docs/input2.txt");
file_exists("docs/input.txt");
file_exists("C:/docs/zero_length2.txt");
file_exists("docs/zero_length.txt");
}
}
</syntaxhighlight>
</syntaxhighlight>
{{ out }}
{{ out }}
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</pre>
"C:/input.txt" exists with a file size of 11 bytes.
"input.txt" exists with a file size of 11 bytes.


"C:/zero_length.txt" exists with a file size of 0 bytes.
"zero_length.txt" exists with a file size of 0 bytes.


"C:/docs/input2.txt" exists with a file size of 11 bytes.
"docs/input.txt" exists with a file size of 11 bytes.


"C:/docs/zero_length2.txt" exists with a file size of 0 bytes.
"docs/zero_length.txt" exists with a file size of 0 bytes.
</pre>
</pre>


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