printf
输出格式化字符串
&reftitle.description;
intprintf
stringformat
mixedvalues
依据 format 格式参数产生输出。
&reftitle.parameters;
&strings.parameter.format;
values
&reftitle.returnvalues;
返回输出字符串的长度。
&reftitle.errors;
&strings.errors.sprintf;
&reftitle.changelog;
&strings.changelog.sprintf;
&reftitle.examples;
<function>printf</function>：多种 format 格式的示例
]]>
&example.outputs;
<function>printf</function>：字符串说明符
]]>
&example.outputs;
&reftitle.seealso;
print
sprintf
fprintf
vprintf
vsprintf
vfprintf
sscanf
fscanf
number_format
date
flush