Constraints of Switch Statement
The expression in the switch
statement should be reduced to an integer value (ASCII characteristics are
integer values).
The case statement should be
integer constant (can be ASCII characters).
Conditional Operator Statement
The conditional operator ‘?’ and
‘:’ are sometimes called ternary operators, since they take three arguments.
In fact, they form a kind of
shortened, ‘if-then-else’.
The general form is:
expression1?
expression2: expression3
“if expression1 is TRUE (that is,
if its value is non-zero), then the value returned will be expression2,
otherwise the value returned will be expression3.
It’s not necessary that the
conditional operators should be used only in arithmetic statements. This is
illustrated in the following example:
Example 1:
int x,y;
scanf(“%d”,&x);
y=(x>5?3:4);
The equivalent If statement will
be,
if(x>5)
y=3;
else
y=4;
Example 2:
char a;
int y;
scanf(“%c”,&a);
y=(a>=65 &&
a<=90?1:0);
Example 3:
if(x>5)
y=3;
else
y=4;
char a=’z’;
printf(“%c”,(a>=’a’?a:’1’));
Example 4: To find the maximum of
3 numbers a,b,c:
int big,a,b,c;
big=(a>b?(a>c?a:c):b>c?b:c));
