Fichero: Uso fwrite

#include <stdio.h>

int main(){
	
	FILE *fp;
	char cadena[] = "Uso fwrite en ficheros\n";
	
	fp = fopen("usofwrite","r+");
	fwrite(cadena, sizeof(char), sizeof(cadena),fp);
	fclose(fp);
	
	system("pause");
	return 0;
}