Question

C语言编程题目求解答？

13和15题

Answer 1

13题
#include<stdio.h>

int main(void)
{

int a, b, c, d;

printf("请输入4个整型数：");
scanf("%d %d %d %d", &a, &b, &c, &d);
printf("%d %d %d %d的平均值是 %.2f", a, b, c, d, (a + b + c + d) / 4.0);

return 0;
}

15题没有明确指定x1,x2, y1,y2的类型，全部假定为double吧
#include<stdio.h>
#include<math.h>

int main(void)
{

double x1, y1, x2, y2;

printf("请输入两个点的坐标（x1,y1）（x2,y2）：");
scanf("%lf %lf %lf %lf", &x1, &y1, &x2, &y2);
printf("(%.2f,%.2f)和(%.2f,%.2f)两点之间的距离是 %.2f", x1, y1, x2, y2, sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2)));

return 0;
}