c语言中负数

C中的模数运算符(％)运算符 (The modulus operator (%) operator in C)

The modulus operator is an arithmetic operator in C language; it is a binary operator and works with two operands. It is used to find the remainder.

模运算符是C语言中的算术运算符； 它是一个二进制运算符，并且可以使用两个操作数。 它用于查找余数。

Syntax:

句法：

    operand1 % operand2;

It returns the remainder which comes after dividing operand1 by operand2.

它返回它来除以操作数由操作数后的余数。

Example:

例：

    Input:
int a = -10;
int b = 3;
// finding remainder
result = a%b;
printf("result = %d\n", result);
Output:
result = -1

C code to demonstrate example of modulus operator with positive operands

C代码演示具有正操作数的模运算符的示例

// C program to demonstrate example of
// Modules operator (%)
#include <stdio.h>
int main()
{int a = 10;
int b = 3;
int result;
result = a%b;
printf("result = %d\n", result);
return 0;
}

Output

输出量

    result = 1

负数的模运算符 (Modulus operator with negative numbers)

If we have negative numbers, the result will be based on the left operand's sign, if the left operand is positive – the result will be positive, and if the left operand is negative – the result will be negative.

如果我们有负数，则结果将基于左操作数的符号；如果左操作数为正-结果将为正；如果左操作数为负-结果将为负。

Thus, in the result (remainder), the sign of left operand is appended.

因此， 在结果(余数)中，将添加左操作数的符号 。

Understand with the below table:

了解下表：

    Left operand    Right operand     Result
Positive        Positive        Positive
Positive        Negative        Positive
Negative        Positive        Negative
Negative        Negative        Negative

Example:

例：

    Input:
int a = -10;
int b = 3;
// finding remainder
result = a%b;
printf("result = %d\n", result);
Output:
result = -1

C code to demonstrate example of modulus operator with negative operands

C代码演示具有负操作数的模运算符的示例

// C program to demonstrate example of
// Modules operator (%)
#include <stdio.h>
int main()
{int a = -10;
int b = 3;
int result;
result = a%b;
printf("result = %d\n", result);
a = 10;
b = -3;
result = a%b;
printf("result = %d\n", result);
a = -10;
b = -3;
result = a%b;
printf("result = %d\n", result);
return 0;
}

Output

输出量

result = -1
result = 1
result = -1

翻译自: https://www.includehelp.com/c/modulus-on-negative-numbers.aspx

c语言中负数