C语言，原创函数：将字符串 srcStr 格式化为 destLen长度，不足补空格，多了截断-C language, the original function: string srcStr formatted for destLen length, padded spaces, more truncated

将字符串 srcStr 格式化为 destLen长度，不足补空格，多了截断 -The C++ source code for originality string srcStr to formatted for destLen length, padded space, more truncated