实验

实验1

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

return 0;
}

实验2

#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;
}

实验3

#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();
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' || ans1 == 'Y') && (ans2 == '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;
}

实验4

#include <stdio.h>
int main()
{
double x, y;
char c1, c2, c3;
int a1, a2, a3;
scanf_s("%d%d%d", &a1, &a2, &a3);
printf("a1=%d,a2=%d,a3=%d\n", a1, a2, a3);
scanf_s(" %c%c%c", &c1, &c2, &c3);
printf("c1=%c,c2=%c,c3=%c\n", c1, c2, c3);
scanf_s("%lf%lf", &x, &y);
printf("x=%lf,y=%lf\n", x, y);
return 0;
}

实验5

#include <stdio.h>
#include <math.h>

int main()
{
int year;
year = (int)round(1e9 / (365.0 * 24 * 3600));
printf("10亿秒约等于%d年\n", year);
return 0;
}

实验6

#include <stdio.h>
#include <math.h>

int main()
{
double x, ans;

scanf_s("%lf", &x);
ans = pow(x, 365);
printf("%.2f的365次方：%.2f\n", x, ans);

return 0;
}

实验7

#include <stdio.h>

int main()
{
double c, f;
while (scanf_s("%lf", &c) != EOF)
{
f = 9.0 / 5 * c + 32;
printf("摄氏度c = %.2f时，华氏度f = %.2f\n", c, f);
}
return 0;
}

实验8

#include <stdio.h>
#include <math.h>

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