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  1. #include <iostream>
  2. #include <cstdarg>
  3.  
  4. using namespace std;
  5.  
  6. enum types
  7. {
  8.     INT,
  9.     DOUBLE,
  10.     CHAR,
  11.     STRING
  12. };
  13.  
  14. struct mt
  15. {
  16.     types type;
  17.  
  18.     union
  19.     {
  20.         int         i;
  21.         double      d;
  22.         char        c;
  23.         const char *s;
  24.     } val;
  25.  
  26.     mt(int i)
  27.         : type(INT)
  28.     {
  29.         val.i = i;
  30.     }
  31.  
  32.     mt(double d)
  33.         : type(DOUBLE)
  34.     {
  35.         val.d = d;
  36.     }
  37.  
  38.     mt(char c)
  39.         : type(CHAR)
  40.     {
  41.         val.c = c;
  42.     }
  43.  
  44.     mt(const char *s)
  45.         : type(STRING)
  46.     {
  47.         val.s = s;
  48.     }
  49. };
  50.  
  51. void print(int n, ...)
  52. {
  53.     va_list ap;
  54.  
  55.     va_start(ap, n);
  56.  
  57.     for (int i = 0; i < n; i++)
  58.     {
  59.         mt x(va_arg(ap, mt));
  60.  
  61.         switch (x.type)
  62.         {
  63.         case INT:
  64.             cout << x.val.i << endl;
  65.             break;
  66.         case DOUBLE:
  67.             cout << x.val.d << endl;
  68.             break;
  69.         case CHAR:
  70.             cout << x.val.c << endl;
  71.             break;
  72.         case STRING:
  73.             cout << x.val.s << endl;
  74.             break;
  75.         }
  76.     }
  77.  
  78.     va_end(ap);
  79. }
  80.  
  81. int main()
  82. {
  83.     print(4, mt(2), mt(4.2), mt('a'), mt("Hello"));
  84. }
Runtime error #stdin #stdout 0.01s 2676KB
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Standard input is empty
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Standard output is empty
https://ideone.com/kOKBm
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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