What does sign mean in c language?

In C language, the sign macro is used to determine the sign of an integer or floating point number, returning 1 (positive), 0 (zero), or -1 (negative). It has the following usage: Parameter x: the value to be checked Parameter type: the data type of x (int, long, long long or float, double, long double)

#"The meaning of sign in c

In C language, sign is a preprocessing macro used to determine an integer or Whether the value of a floating point number is positive, negative, or zero.

How to usesign

signThe macro has two parameters:

• x: The integer or floating point number to be checked
• #type: Specifies the data type of x, which can be int, long, long long or float, double, long double# The

##sign macro will return the following values:

• 1: x is positive
• 0: x is 0
• -1: x is negative

Example

sign macro:

<code class="c">#include <stdio.h>

int main() {
  int x = 10;
  printf("x 的符号为: %d\n", sign(x, int));

  float y = -3.14f;
  printf("y 的符号为: %d\n", sign(y, float));

  return 0;
}</code>

Output:

<code>x 的符号为: 1
y 的符号为: -1</code>

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