算術運算符

下表列出了所有C語言支持的算術運算符。假設變量A=10和變量B=20則：

運算符	描述	示例
+	兩個操作數相加	A + B = 30
-	第一操作數減去第二個操作數	A - B = -10
*	兩個操作數相乘	A * B = 200
/	分子除以分母	B / A = 2
%	模運算和整數除法後的餘數	B % A = 0
++	遞增操作者增加一個整數值	A++ = 11
--	遞減操作減少一個整數值	A-- = 9

例子

試試下麵的例子就明白了所有的C編程語言提供的算術運算符：

#include <stdio.h>

main()
{
   int a = 21;
   int b = 10;
   int c ;

   c = a + b;
   printf("Line 1 - Value of c is %d
", c );
   c = a - b;
   printf("Line 2 - Value of c is %d
", c );
   c = a * b;
   printf("Line 3 - Value of c is %d
", c );
   c = a / b;
   printf("Line 4 - Value of c is %d
", c );
   c = a % b;
   printf("Line 5 - Value of c is %d
", c );
   c = a++; 
   printf("Line 6 - Value of c is %d
", c );
   c = a--; 
   printf("Line 7 - Value of c is %d
", c );

}

當編譯和執行上麵的程序，它會產生以下結果：

Line 1 - Value of c is 31
Line 2 - Value of c is 11
Line 3 - Value of c is 210
Line 4 - Value of c is 2
Line 5 - Value of c is 1
Line 6 - Value of c is 21
Line 7 - Value of c is 22