Cprogramming-c-assignment-operators
提供:Dev Guides
Cの代入演算子
次の表は、C言語でサポートされている割り当て演算子を示しています-
Operator | Description | Example |
---|---|---|
= | Simple assignment operator. Assigns values from right side operands to left side operand | C = A + B will assign the value of A + B to C |
+= | Add AND assignment operator. It adds the right operand to the left operand and assign the result to the left operand. | C += A is equivalent to C = C + A |
-= | Subtract AND assignment operator. It subtracts the right operand from the left operand and assigns the result to the left operand. | C -= A is equivalent to C = C - A |
*= | Multiply AND assignment operator. It multiplies the right operand with the left operand and assigns the result to the left operand. | C *= A is equivalent to C = C *A |
/= | Divide AND assignment operator. It divides the left operand with the right operand and assigns the result to the left operand. | C/= A is equivalent to C = C/A |
%= | Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand. | C %= A is equivalent to C = C % A |
<⇐ | Left shift AND assignment operator. | C <⇐ 2 is same as C = C << 2 |
>>= | Right shift AND assignment operator. | C >>= 2 is same as C = C >> 2 |
&= | Bitwise AND assignment operator. | C &= 2 is same as C = C & 2 |
^= | Bitwise exclusive OR and assignment operator. | C ^= 2 is same as C = C ^ 2 |
= | Bitwise inclusive OR and assignment operator. | |
C | = 2 is same as C = C | 2 |
例
Cで利用可能なすべての代入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 = 21;
int c ;
c = a;
printf("Line 1 - = Operator Example, Value of c = %d\n", c );
c += a;
printf("Line 2 - += Operator Example, Value of c = %d\n", c );
c -= a;
printf("Line 3 - -= Operator Example, Value of c = %d\n", c );
c* = a;
printf("Line 4 - *= Operator Example, Value of c = %d\n", c );
c/= a;
printf("Line 5 -/= Operator Example, Value of c = %d\n", c );
c = 200;
c %= a;
printf("Line 6 - %= Operator Example, Value of c = %d\n", c );
c <<= 2;
printf("Line 7 - <<= Operator Example, Value of c = %d\n", c );
c >>= 2;
printf("Line 8 - >>= Operator Example, Value of c = %d\n", c );
c &= 2;
printf("Line 9 - &= Operator Example, Value of c = %d\n", c );
c ^= 2;
printf("Line 10 - ^= Operator Example, Value of c = %d\n", c );
c |= 2;
printf("Line 11 - |= Operator Example, Value of c = %d\n", c );
}
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 - = Operator Example, Value of c = 21
Line 2 - += Operator Example, Value of c = 42
Line 3 - -= Operator Example, Value of c = 21
Line 4 - *= Operator Example, Value of c = 441
Line 5 -/= Operator Example, Value of c = 21
Line 6 - %= Operator Example, Value of c = 11
Line 7 - <<= Operator Example, Value of c = 44
Line 8 - >>= Operator Example, Value of c = 11
Line 9 - &= Operator Example, Value of c = 2
Line 10 - ^= Operator Example, Value of c = 0
Line 11 - |= Operator Example, Value of c = 2