使用strftime（您需要先转换time_t为struct tm*）：
char buff[20];
struct tm * timeinfo;
timeinfo = localtime (&mtime);
strftime(buff, sizeof(buff), "%b %d %H:%M", timeinfo);
格式：
%b - The abbreviated month name according to the current locale.
%d - The day of the month as a decimal number (range 01 to 31).
%H - The hour as a decimal number using a 24-hour clock (range 00 to 23).
%M - The minute as a decimal number (range 00 to 59).
这是完整的代码：
struct stat info;
char buff[20];
struct tm * timeinfo;
stat(workingFile, &info);
timeinfo = localtime (&(info.st_mtime));
strftime(buff, 20, "%b %d %H:%M", timeinfo);
printf("%s",buff);
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