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sizeof and ternary operators in C
Besides the operators discussed above, there are few a other important operators including sizeof and ? : supported by the C Language.
Operator | Description | Example |
---|---|---|
sizeof() | Returns the size of a variable. | sizeof(a), where a is integer, will return 4. |
& | Returns the address of a variable. | &a; returns the actual address of the variable. |
* | Pointer to a variable. | *a; |
? : | Conditional Expression. | If Condition is true ? then value X : otherwise value Y |
Example
Try following example to understand all the miscellaneous operators available in C −
#include <stdio.h> main() { int a = 4; short b; double c; int* ptr; /* example of sizeof operator */ printf("Line 1 - Size of variable a = %d\n", sizeof(a) ); printf("Line 2 - Size of variable b = %d\n", sizeof(b) ); printf("Line 3 - Size of variable c= %d\n", sizeof(c) ); /* example of & and * operators */ ptr = &a; /* 'ptr' now contains the address of 'a'*/ printf("value of a is %d\n", a); printf("*ptr is %d.\n", *ptr); /* example of ternary operator */ a = 10; b = (a == 1) ? 20: 30; printf( "Value of b is %d\n", b ); b = (a == 10) ? 20: 30; printf( "Value of b is %d\n", b ); }
When you compile and execute the above program, it produces the following result −
Line 1 - Size of variable a = 4 Line 2 - Size of variable b = 2 Line 3 - Size of variable c= 8 value of a is 4 *ptr is 4. Value of b is 30 Value of b is 20
c_operators.htm
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