[Study Notes] [C Language] Three-object operator, learning note Operator

[Study Notes] [C Language] Three-object operator, learning note Operator

1. N object Operator

Like logical non (!) A negative sign (-) that connects only one data. It is called a single-object operator, such! 5.-5.
A negative number that connects two data, such as arithmetic operators, Relational operators, and logical operators, is called a binary operator ", for example, 6 + 7, 8*5, 5> 6, 4 & 0,
Similarly, operators that connect three data are called "Three-object operators"

 2. Three-object Operator

The C language provides a unique three-object OPERATOR: Conditional operator.
1> Format

Expression? Expression B: expression C
2> operation result

If expression A is true, the result of the conditional operator is the value of expression B. Otherwise, it is the value of expression C.
3> integration direction and priority

The priority is: Arithmetic Operators> Relational operators> conditional operators> value assignment operators.
The combination direction of conditional operators is "from right to left"

int a = 3>4 ? 4+5 : 5>4 ? 5+6 : 6>7+1;

The above code is equivalent

int a = (3>4) ? (4+5) : ( (5>4) ? (5+6) : (6>(7+1)) );

To simplify the process

int a = 0 ? 9 : ( 1 ? 11 : 0 );

Simplified

int a = 0 ? 9 : 11;

So the value of a is 11.

 

 

1 // What are the three-object operator conditions? Value 1: Value 2 2 3 // int a =! 100? 9: 89; 4 5 // printf ("a = % d \ n", a); 6 7 8 # include <stdio. h> 9 10 int main () 11 {12/* calculate the maximum value between two integers 13 int a = 10; 14 15 int B = 99; 16 17 int c = a> B? A: B; 18 19 printf ("c is % d \ n", c); 20 */21 22 // calculate the maximum value between the three integers 23 int a = 10; 24 int B = 999999; 25 int c = 1000; 26 27 // obtain the maximum value of a and B 28 int abMax = (a> B )? A: B; 29 // obtain the final maximum value 30 int d = (abMax> c )? AbMax: c; 31 32 // int d = (a> B )? A: B)> c )? (A> B )? A: B): c; 33 34 printf ("d is % d \ n", d); 35 return 0; 36}