std::rewind
From cppreference.com
| Defined in header <cstdio>
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| void rewind( std::FILE* stream ); |
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Moves the file position indicator to the beginning of the given file stream.
The function is equivalent to std::fseek(stream, 0, SEEK_SET);, except that end-of-file and error indicators are cleared.
The function drops any effects from previous calls to ungetc.
Parameters
| stream | - | file stream to modify |
Return value
(none)
Example
Run this code
#include <cstdio> int main() { std::FILE *f; char ch; char str[20]; f = std::fopen("file.txt", "w"); for (ch = '0'; ch <= '9'; ch++) { std::fputc(ch, f); } std::fclose(f); std::FILE* f2 = std::fopen("file.txt", "r"); unsigned int size = std::fread(str, 1, 10, f2); std::puts(str); std::printf("\n%u\n",size); std::rewind(f2); unsigned int size2 = std::fread(str, 1, 10, f2); std::puts(str); std::printf("\n%u",size2); std::fclose(f2); }
See also
| moves the file position indicator to a specific location in a file (function) | |
| C documentation for rewind
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