C语言镜头焦距程序
给定两个浮点值;图像距离和物体距离透镜;任务是打印透镜的焦距。
什么是焦距?
光学系统的焦距是指透镜或曲面镜的中心与其焦点之间的距离。
让我们借助下图来理解:

在上图中,i 是物体,F 是形成的物体的像,f 是像的焦距。
因此,要根据透镜找到像的焦距,公式为:
1F= 1O+1I
其中,F 是焦距。
O 是透镜和物体之间的总距离。
I 是透镜和透镜形成的像之间的总距离。
示例
Input: image_distance=5, object_distance=10 Output: Focal length of a lens is: 3.333333 Explanation: 1/5 + 1/10 = 3/10🡺 F = 10/3 = 3.33333333 Input: image_distance = 7, object_distance = 10 Output: Focal length of a lens is: 4.1176470
我们用来解决上述问题的方案:
- 获取image_disance和object_distance的输入。
- 找到1/image_distance和1/object_distance的和,并返回结果除以1的结果。
- 打印结果。
算法
Start Step 1-> In function float focal_length(float image_distance, float object_distance) Return 1 / ((1 / image_distance) + (1 / object_distance)) Step 2-> In function int main() Declare and initialize the first input image_distance = 5 Declare and initialize the second input object_distance = 10 Print the results obtained from calling the function focal_length(image_distance, object_distance) Stop
示例
#include <stdio.h>
// Function to find the focal length of a lens
float focal_length(float image_distance, float object_distance) {
return 1 / ((1 / image_distance) + (1 / object_distance));
}
// main function
int main() {
// distance between the lens and the image
float image_distance = 5;
// distance between the lens and the object
float object_distance = 10;
printf("Focal length of a lens is: %f
", focal_length(image_distance, object_distance));
return 0;
}输出
Focal length of a lens is: 3.333333
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