C++stdio库中的格式化输出技巧

C++?stdio????????????????,?printf?fprintf?????????????????????????????????????:

1. ???????:

   • %d:??(int)
   • %ld:???(long int)
   • %lld:????(long long int)
   • \u:?????(unsigned int)
   • %lu:??????(unsigned long int)
   • %llu:???????(unsigned long long int)
   • %f:???(float)
   • %lf:??????(double)
   • %Lf:???????(long double)
   • %c:??(char)
   • %s:???(const char*)
   • %p:??(void*)

2. ?????:

   • -:???
   • +:?????
   • 0:?????
   • #:??????????????
   • ??:????????

3. ?????:

   • ??:?????????,????????????:],???????????5,?????????
   • ??:???????????????:%.2f,?????,???????

4. ????:

   ??????????????????,?????????????????:

   #include
   #include 
   
   int main() {
       int num = 42;
       float pi = 3.14159;
   
       printf("Number: %-5d, Pi: %.2f\n", num, pi);
       printf("Number: d, Pi: %#.2f\n", num, pi);
       printf("Number: %+5d, Pi: % .2f\n", num, pi);
   
       return 0;
   }
   

   ????:

   Number: 42   , Pi: 3.14
   Number: 00042, Pi: 3.14
   Number: +42  , Pi: 3.14
   

?????????????,?????????C++?????????