Cprogramming-c-logical-operators

Cの論理演算子

次の表は、C言語でサポートされているすべての論理演算子を示しています。 変数 A が1を保持し、変数 B が0を保持すると仮定します-

Operator	Description	Example
&&	Called Logical AND operator. If both the operands are non-zero, then the condition becomes true.	(A && B) is false.
Called Logical OR Operator. If any of the two operands is non-zero, then the condition becomes true.	(A
B) is true.	!	Called Logical NOT Operator. It is used to reverse the logical state of its operand. If a condition is true, then Logical NOT operator will make it false.

例

Cで利用可能なすべての論理演算子を理解するために、次の例を試してください-

#include <stdio.h>

main() {

   int a = 5;
   int b = 20;
   int c ;

   if ( a && b ) {
      printf("Line 1 - Condition is true\n" );
   }

   if ( a || b ) {
      printf("Line 2 - Condition is true\n" );
   }

  /*lets change the value of  a and b*/
   a = 0;
   b = 10;

   if ( a && b ) {
      printf("Line 3 - Condition is true\n" );
   } else {
      printf("Line 3 - Condition is not true\n" );
   }

   if ( !(a && b) ) {
      printf("Line 4 - Condition is true\n" );
   }

}

上記のプログラムをコンパイルして実行すると、次の結果が生成されます-

Line 1 - Condition is true
Line 2 - Condition is true
Line 3 - Condition is not true
Line 4 - Condition is true