C Language Example - Determine Positive/Negative Number
C Language ExamplesUser inputs a number, determine whether the number is positive, negative, or zero.
Example
#include <stdio.h>
int main()
{
double number;
printf("Enter a number:");
scanf("%lf", &number);
if (number <= 0.0)
{
if (number == 0.0)
printf("You entered 0.");
else
printf("You entered a negative number.");
}
else
printf("You entered a positive number.");
return 0;
}
Run result:
输入一个数字: 9 你输入的是正数。other extensions