定义一个整型一维数组，在主函数main中

Question

Answer 1

#include <stdio.h>
int fun(int a[], int num)
{
int x = 0;
for (int i = 0; i < num; i++) x += a[i];
return x;
}
int main()
{
int a[1000];
int n;
scanf(%d", &n);
for (int i = 0; i < n; i++) scanf("%d", &a[i]);
printf("%d", fun(a, n));
return 0;
}

#include <stdio.h>
#include <math.h>
struct Point
{
int x;
int y;
};
int main()
{
Point p1, p2;
scanf("%d%d", &(p1.x), &(p1.y));
scanf("%d%d", &(p2.x), &(p2.y));
float dis = sqrt((p1.x - p2.x) * (p1.x - p2.x) + (p1.y - p2.y) * (p1.y - p2.y));
printf("p1关于x轴对称点 %d,%d\n", p1.x, -p1.y);
printf("p2关于原点对称点 %d,%d\n", -p2.x, -p2.y);
printf("距离 %f",dis);
return 0;
}