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8 <title>FatFs - f_printf</title>
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15 <p>The f_printf function writes formatted string to the file.</p>
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18 FIL* <em>FileObject</em>, /* File object */
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19 const char* <em>Foramt</em>, /* Format stirng */
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29 <dd>Pointer to the open file object structure.</dd>
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31 <dd>Pointer to the null-terminated format string.</dd>
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33 <dd>Optional arguments.</dd>
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40 <h4>Return Values</h4>
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41 <p>When the function succeeded, number of characters written is returned. When the function failed due to disk full or any error, an <tt>EOF</tt> will be returned.</p>
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46 <h4>Description</h4>
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47 <p>The f_printf() is a wrapper function of <a href="putc.html">f_putc()</a> and <a href="puts.html">f_puts()</a>. The format control directive is a sub-set of standard library. It supports <tt>c s d u X</tt> for the data type, <tt>l</tt> for the precision and <tt>0</tt> for the flags.</p>
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48 <p>This function is available when read-write configuration and <tt>_USE_STRFUNC</tt> is 1 or 2.</p>
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55 f_printf(&fil, "%6d", -200); // " -200"
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56 f_printf(&fil, "%02u", 5); // "05"
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57 f_printf(&fil, "%ld", 12345678L); // "12345678"
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58 f_printf(&fil, "%08lX", 1194684UL); // "00123ABC"
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59 f_printf(&fil, "%s", "String"); // "String"
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60 f_printf(&fil, "%c", 'a'); // "a"
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67 <p><tt><a href="open.html">f_open</a>, <a href="putc.html">f_putc</a>, <a href="puts.html">f_puts</a>, <a href="gets.html">f_gets</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p>
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70 <p class="foot"><a href="../00index_e.html">Return</a></p>
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