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C Language Programming Library Reference Guide

stdio.h - File Functions - fwrite

Declaration:

size_t fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream); Writes data from the array pointed to by ptr to the given stream. It writes nmemb number of elements of size size. The total number of bytes written is (size*nmemb).

On success the number of elements written is returned. On error the total number of elements successfully written (which may be zero) is returned.

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