- 我必须创建一个包含x、y和z的结构向量3d
- 然后我必须创建两个类型为structvector3d的变量,并在其中存储两个向量
- 接下来,我要写一个函数来计算这两个向量的点和叉积。哪种退货类型是必要的
这就是我现在所拥有的。也许有人能帮我。
#include <stdio.h>
#include <stdlib.h>
int n = 3;
struct vector3d
{
int x, y, z;
};
int dot_product (int v1[], int v2[], int n)
{
int dproduct = 0;
n = 3;
for(int i = 0; i < n; i++)
dproduct += v1[i] * v2[i];
return dproduct;
}
void cross_product (int v1[], int v2[], int crossproduct[])
{
crossproduct[0] = v1[1] * v2[2] - v1[2] * v2[1];
crossproduct[1] = v1[0] * v2[2] - v1[2] * v2[0];
crossproduct[2] = v1[0] * v2[1] - v1[1] * v2[0];
}
int main()
{
struct vector3d v1 = {0,0,0};
struct vector3d v2 = {0,0,0};
printf("Vector 1 - Enter value for x: ");
scanf("%d", &v1.x);
printf("Vector 1 - Enter value for y: ");
scanf("%d", &v1.y);
printf("Vector 1 - Enter value for z: ");
scanf("%d", &v1.z);
printf("Vector 2 - Enter value for x: ");
scanf("%d", &v2.x);
printf("Vector 2 - Enter value for y: ");
scanf("%d", &v2.y);
printf("Vector 2 - Enter value for z: ");
scanf("%d", &v2.z);
}
不能用int[]
代替vector3d
。您可以传递向量结构并使用它来执行任务。我已经写了这个代码,您可以根据需要进行修改。
#include <stdio.h>
#include <stdlib.h>
int n = 3;
typedef struct vector3d
{
int x, y, z;
} vector3d;
int dot_product(vector3d v1, vector3d v2)
{
int dproduct = 0;
dproduct += v1.x * v2.x;
dproduct += v1.y * v2.y;
dproduct += v1.z * v2.z;
return dproduct;
}
vector3d cross_product(vector3d v1, vector3d v2)
{
vector3d crossproduct = {0, 0, 0};
crossproduct.x = v1.y * v2.z - v1.z * v2.y;
crossproduct.y = v1.x * v2.z - v1.z * v2.x;
crossproduct.z = v1.x * v2.y - v1.y * v2.x;
return crossproduct;
}
int main()
{
vector3d v1 = {0, 0, 0};
vector3d v2 = {0, 0, 0};
printf("Vector 1 - Enter value for x: ");
scanf("%d", &v1.x);
printf("Vector 1 - Enter value for y: ");
scanf("%d", &v1.y);
printf("Vector 1 - Enter value for z: ");
scanf("%d", &v1.z);
printf("Vector 2 - Enter value for x: ");
scanf("%d", &v2.x);
printf("Vector 2 - Enter value for y: ");
scanf("%d", &v2.y);
printf("Vector 2 - Enter value for z: ");
scanf("%d", &v2.z);
printf("Dotproduct: %dn", dot_product(v1, v2));
vector3d cp = cross_product(v1, v2);
printf("Crossproduct: x:%d y:%d z:%d", cp.x, cp.y, cp.z);
return 0;
}
//OUTPUT
Vector 1 - Enter value for x: 1
Vector 1 - Enter value for y: 2
Vector 1 - Enter value for z: 3
Vector 2 - Enter value for x: 3
Vector 2 - Enter value for y: 2
Vector 2 - Enter value for z: 1
Dotproduct: 10
Crossproduct: x:-4 y:-8 z:-4
在未来,试着自己去思考这些小事。
使用typedef
创建结构的别名,并在向量分析函数中使用该结构(将结构传递给函数(。要访问结构的字段,请使用.
表示法。还有另一种可能性是将结构作为指向结构的指针传递给函数,在这种情况下,您使用->
表示法来访问字段(将指向结构的指示器/引用传递给函数,https://www.tutorialspoint.com/cprogramming/c_structures.htm)
typedef struct
{
int x;
int y;
int z;
} vector3d;
int dot_product (vector3d v1, vector3d v2)
{
return v1.x * v2.x + v1.y * v2.y + v1.z * v2.z;
}
在这个链接中,使用的不是三维矢量复数(近似为"二维矢量"(,您可以调整它:https://www.programiz.com/c-programming/c-structure-function