实验一.

include<stdio.h>

include<stdlib.h>

int main()
{
printf(" O 0\n");
printf(" \n");
printf("I I I I\n");

system("pause");
return 0;

}

include<stdio.h>

include<stdlib.h>

int main()
{ float a,b,c;
scanf("%f%f%f",&a,&b,&c);
if(a+b>c&&a+c>b &&b+c>a)
printf("能构成三角形");
else
printf("不能构成三角形");

system("pause");
return 0;

}

include<stdio.h>

include<stdlib.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表示没有敲）：");
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");

system("pause");
return 0;

}

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);

scanf("%c%c%c", &c1, &c2, &c3);
printf("c1 = %c,c2 = %c,c3 = %c\n", c1, c2, c3);

scanf("%lf%lf", &x, &y);
printf("x = %f, y = %lf\n",x, y);

system("pause");
return 0;

}

include<stdio.h>

include<stdlib.h>

int main()
{
int year;
int s=1e9;
double y;
y=s1.0/(360024*365)+0.5;
year=y;

printf("10亿秒约等于%d年\n",year);
system("pause");
return 0;

}#include<stdio.h>

include<math.h>

include<stdlib.h>

int main()
{
double c,f;

while(scanf("%lf",&c)!=EOF)
{
f=9*c/5+32;
printf("摄氏度c=%.2f时，华氏摄氏度f=%.2f\n",c,f);
printf("\n");
}
system("pause");
return 0;

}

include<stdio.h>

include<math.h>

include<stdlib.h>

int main()
{
double x,ans;

scanf("%lf",&x);
ans=pow(x,365);
printf("%.2f的365次方:%.2f\n",x,ans);
system("pause");
return 0;![](https://img2024.cnblogs.com/blog/3405778/202403/3405778-20240317150455007-1373883007.png)

include<stdio.h>

include<math.h>

include<stdlib.h>

int main()
{
double c,f;

while(scanf("%lf",&c)!=EOF)
{
f=9*c/5+32;
printf("摄氏度c=%.2f时，华氏摄氏度f=%.2f\n",c,f);
printf("\n");
}
system("pause");
return 0;

}

include<stdio.h>

include<math.h>

include<stdlib.h>

int main()
{
float a,b,c,s,area;
while(scanf("%f%f%f",&a,&b,&c)!=EOF)
{
s=(a+b+c)/2;
area=sqrt(s(s-a)(s-b)*(s-c));
printf("三角形的面积是:%.3f",area);
printf("\n");}
system("pause");
return 0;
}