C语言计算角度的正弦值（保留两位小数）

#include <stdio.h>
#include <math.h>

int main()
{
    double angle, radian, sine;
    const double PI = 3.14159;

    printf("Please input an angle in degrees: ");
    scanf("%lf", &angle);

    radian = angle * PI / 180.0; // convert degree to radian
    sine = sin(radian); // calculate sine value

    printf("The sine of %lf degrees is %.2lf.\n", angle, sine);

    return 0;
}