C的打印输出格式

#include<stdio.h>
int main()
{
   float test1=12.3224356546565461-0.1;
   int   test2=13;
   char  test3[]="This is a test string !";
   printf("%03d %+i %-5u %o %x %X\n",test2,test2,test2,test2,test2,test2);
   printf("%f,%lf ,%e, %E %g %G \n",test1,test1,test1,test1,test1,test1);
   printf("%s\n",test3,test3);
   return 0;
}