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The formula expressing the circumference of a circle in C language is: 2 π radius, where π is the pi ratio (approximate value 3.14159265), and radius is the radius of the circle. Sample code: define PI 3.14159265 (define π constant) float radius; (declare radius variable) scanf("%f", &radius); (read radius input) float circumference = 2 PI radius; (calculate circle circumference) printf(" The circumference of the circle is: %.2f\n", circumference); (print result)
The representation of the circumference of the circle in C language
In C language, the circumference of a circle can be represented by the formula 2 * π * radius
, where:
π
is the pi ratio , is a constant with an approximate value of 3.14159265. radius
is the radius of the circle. Sample code
The following C language code calculates and prints the circumference of a circle:
<code class="c">#include <stdio.h> #define PI 3.14159265 // 定义 π 的近似值 int main() { float radius; printf("输入圆的半径:"); scanf("%f", &radius); float circumference = 2 * PI * radius; printf("圆周长为:%.2f\n", circumference); return 0; }</code>
In the code:
#define PI 3.14159265
Row definition PI
is an approximate value of π. float radius
declares a floating point variable radius
to store the radius. scanf("%f", &radius)
Reads the radius from user input. float circumference = 2 * PI * radius
Calculate the circumference of the circle and store it in the circumference
variable. printf("The circumference of the circle is: %.2f\n", circumference)
Print the value of the circumference of the circle. The above is the detailed content of How to express the circumference of a circle in C language. For more information, please follow other related articles on the PHP Chinese website!