Defined in header <cstdio> | ||
|---|---|---|
void rewind( std::FILE* stream ); |
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.
| stream | - | file stream to modify |
(none).
#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);
}| moves the file position indicator to a specific location in a file (function) |
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