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C++ Programming/Code/Standard C Library/Functions/setbuf
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setbuf
#include <cstdio>
void setbuf( FILE *stream, char *buffer );
The setbuf() function sets stream to use buffer, or, if buffer is NULL, turns off buffering. This function expects that the buffer be BUFSIZ characters long - since this function does not support specifying the size of the buffer, buffers larger than BUFSIZ will be partly unused.
Related topics fclose - fopen - setvbuf