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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. typedef void(functionPtr)(int);
  5.  
  6. void function(int a){
  7. 	std::cout << a << std::endl;
  8. }
  9.  
  10. int main() {
  11.  
  12. 	functionPtr fun;
  13. 	fun(5);
  14.  
  15. 	return 0;
  16. }
Compilation error #stdin compilation error #stdout 0s 3412KB
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stdin
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Standard input is empty
compilation info 
/home/W0jOUV/ccllWY1g.o: In function `main':
prog.cpp:(.text.startup+0x14): undefined reference to `fun(int)'
collect2: error: ld returned 1 exit status
stdout
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Standard output is empty
https://ideone.com/e20FmU
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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