C Programming: Understanding Operator Precedence and Side Effects
The output of this program is:
3,0,1,1
Explanation:
- 'a = b = c' assigns the value of 'c' to 'b' and then to 'a', so 'a', 'b', and 'c' all become 3. Therefore, the first value printed is 3.
- 'a = b == c' first checks if 'b' is equal to 'c' (which is true), and then assigns the resulting value of 1 to 'a'. Therefore, the second value printed is 0 (false is printed as 0 in C).
- 'a == (b = c)' assigns the value of 'c' to 'b' and then checks if 'a' is equal to the new value of 'b' (which is 3). Therefore, the third value printed is 1.
- 'a == (b == c)' first checks if 'b' is equal to 'c' (which is true), and then checks if 'a' is equal to the resulting value of 1. Therefore, the fourth value printed is also 1.
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