- #include <stdio.h> 
-   
- int main(int ac, char* av[]) { 
-   
- 	int a = 2; 
- 	if (a) 		printf("a is true\n"); else printf("a is false\n"); 
- 	if (a == true) 	printf("a is true\n"); else printf("a is false\n"); 
- 	if (a != false) printf("a is true\n"); else printf("a is false\n"); 
- 	if (static_cast<bool>(a) == true) 
- 		 	printf("a is true\n"); else printf("a is false\n"); 
- 	return 0; 
- }	 
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