实验1

task1

#include <stdio.h>
int main()
{
printf(" O \n");
printf("<H>\n");
printf("I I\n");
printf(" O \n");
printf("<H>\n");
printf("I I\n");
return 0;
}

 task1_2

#include <stdio.h>
int main()
{
printf(" O O \n");
printf("<H> <H>\n");
printf("I I I I\n");
return 0;
}

 task2

#include <stdio.h>
int main()
{
double a, b, c;
scanf_s("%lf%lf%lf", &a, &b, &c);
if (a+b>c&&a+c>b&&b+c>a)
printf("能构成三角形\n");
else
printf("不能构成三角形\n");
return 0;
}

 

 task3

#include <stdio.h>
int main()
{
char ans1, ans2;
printf("每次课前认真预习、课后及时复习了没? (输入y或Y表示有，输入n或N表示没有) : ");
ans1 = getchar();
getchar();      [去掉这行会导致输入第一个字母后直接结束进程，导致无法输入ans2。因为第一个getchar会读取到前面输入数据后残留的那个回车换行符。]
printf("\n动手敲代码实践了没? (输入y或Y表示敲了，输入n或N表示木有敲) : ");
ans2 = getchar();
if (ans1=='y' && ans2 == 'Y' ||ans1=='Y'&& ans2=='y' || ans1 == 'Y' && ans2 == 'Y' || ans1=='y'&&ans2=='y')
printf("\n罗马不是一天建成的, 继续保持哦:)\n");
else
printf("\n罗马不是一天毁灭的, 我们来建设吧\n");
return 0;
}

 

 

 

 task4

#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>

int main()
{
double x, y;
char c1, c2, c3;
int a1, a2, a3;

scanf("%d %d %d", &a1, &a2, &a3);
printf("a1 = %d, a2 = %d, a3 = %d\n", a1, a2, a3);
getchar();
scanf("%c %c %c", &c1, &c2, &c3);
printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);
getchar();
scanf("%lf %lf", &x, &y);
printf("x = %lf, y = %lf\n", x, y);
return 0;
}

 

 

task5

#include <stdio.h>
int main()
{
int year;
year = 1e9/60/60/24/365;
printf("10亿秒约等于%d年\n", year);
return 0;
}

 task6

#include <stdio.h>
#include <math.h>
int main()
{
double x, ans;
for (int a = 0; a < 3; a = a + 1) {
scanf_s("%lf", &x);
ans = pow(x, 365);
printf("%.2f的365次方: %.2f\n", x, ans);
}
return 0;
}

 task7

#include <stdio.h>

int main()
{

double F, C;
while (scanf_s("%lf", &C) != EOF)
{

F = C * 9 / 5 + 32;
printf("摄氏度C：%.2lf，华氏度F:%.2lf\n", C, F);
printf("\n");
}
return 0;
}

 task8

#include<stdio.h>
#include<math.h>
int main()
{
int a, b, c;
double s, area;
while (scanf_s("%d%d%d", &a, &b, &c) != EOF)
{
s = (a + b + c) / 2;
area = sqrt(s * (s - a) * (s - b) * (s - c));
printf("a=%d,b=%d,c=%d,area=%.3lf\n", a, b, c, area);
printf("\n");
}
return 0;
}