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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 multitype
  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.  
  27. };
  28.  
  29. multitype mt(int i)
  30.     {
  31.         multitype res;
  32.         res.type = INT;
  33.         res.val.i = i;
  34.         return res;
  35.     }
  36.  
  37. multitype mt(double d)
  38.     {
  39.         multitype res;
  40.         res.type = DOUBLE;
  41.         res.val.d = d;
  42.         return res;
  43.     }
  44.  
  45. multitype mt(char c)
  46.     {
  47.         multitype res;
  48.         res.type = CHAR;
  49.         res.val.c = c;
  50.         return res;
  51.     }
  52.  
  53. multitype mt(const char *s)
  54.     {
  55.         multitype res;
  56.         res.type = STRING;
  57.         res.val.s = s;
  58.         return res;
  59.     }
  60.  
  61. void print(int n, ...)
  62. {
  63.     va_list ap;
  64.  
  65.     va_start(ap, n);
  66.  
  67.     for (int i = 0; i < n; i++)
  68.     {
  69.         multitype x(va_arg(ap, multitype));
  70.  
  71.         switch (x.type)
  72.         {
  73.         case INT:
  74.             cout << x.val.i << endl;
  75.             break;
  76.         case DOUBLE:
  77.             cout << x.val.d << endl;
  78.             break;
  79.         case CHAR:
  80.             cout << x.val.c << endl;
  81.             break;
  82.         case STRING:
  83.             cout << x.val.s << endl;
  84.             break;
  85.         }
  86.     }
  87.  
  88.     va_end(ap);
  89. }
  90.  
  91. int main()
  92. {
  93.     print(4, mt(2), mt(4.2), mt('a'), mt("Hello"));
  94. }
Success #stdin #stdout 0.01s 2680KB
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stdin
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Standard input is empty
stdout
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2
4.2
a
Hello
https://ideone.com/bSzz7
language:
C++ (gcc 8.3)
created:
12 years ago
visibility:
public

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