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  1. #include <stdio.h>
  2.  
  3. int func( int (*x)(int,int) ) { return x(20, 5); }
  4. int func2( int x(int,int) ) { return x(20, 5); }
  5. int func3( int(fn)() ) { return fn(); }
  6. int func4( int(*fn)() ) { return fn(); }
  7. typedef int cellulae_func(int, int);
  8. int tabula(cellulae_func *cell, int lat, int alt) { return cell(lat, alt); }
  9. int soma(int x, int y) { return x + y; }
  10. int sub(int x, int y) { return x - y; }
  11. int teste() { return 42; }
  12. int main(void) {
  13.     printf("%d\n", tabula(soma, 20, 5));
  14.     printf("%d\n", tabula(sub, 20, 5));
  15.     printf("%d\n", func(soma));
  16.     printf("%d\n", func2(soma));
  17.     printf("%d\n", func3(teste));
  18.     printf("%d\n", func4(teste));
  19.     printf("%d\n", func4(soma)); //funciona, mas está errado
  20.     int (*funcs[2])(int x, int y);
  21.     funcs[0] = soma;
  22.     funcs[1] = sub;
  23.     printf("%d\n", func(funcs[0]));
  24. }
  25.  
  26. //https://pt.stackoverflow.com/q/322422/101
Success #stdin #stdout 0s 4168KB
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25
15
25
25
42
42
-749435031
25
https://ideone.com/CKT2xx
language:
C99 (gcc 8.3)
created:
5 years ago
visibility:
public

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