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  1. #include <iostream>
  2.  
  3.  
  4. int main(){
  5.  
  6. 	//		. The compiler applies implicit conversions
  7. 	// 			when types are different in 
  8. 	//			an expression
  9. 	//		. Conversions are always done from the smallest
  10. 	//			to the largest type in this case int is 
  11. 	//			transformed to double before the expression
  12. 	//			is evaluated.Unless we are doing an assignment
  13.  
  14. 	double price { 45.6 };
  15.     int units {10};
  16.  
  17.     auto total_price = units * price; // units will be implicitly converted to double
  18.  
  19. 	std::cout << "Total price : " << total_price << std::endl;
  20. 	std::cout << "sizeof total_price : " << sizeof(total_price) << std::endl;
  21.  
  22.  
  23. 	//Implicit conversions in assignments
  24. 	// The assignment operation is going to cause an implicit
  25. 	// narrowing conversion , y is converted to int before assignment
  26. 	int x (45.44);
  27.     double y ;
  28.     y= x; // double to int
  29. 	std::cout << "The value of x is : " << y << std::endl; // 45
  30. 	std::cout << "sizeof x : " << sizeof(y) << std::endl;// 4
  31.  
  32.  
  33.     return 0;
  34. }
Success #stdin #stdout 0.01s 5284KB
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stdin
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Standard input is empty
stdout
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Total price : 456
sizeof total_price : 8
The value of x is : 45
sizeof x : 8
https://ideone.com/pqdaEx
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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