实验1-

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

include <stdio.h>

include <stdlib.h>

int main(){
float a,b,c;
while(scanf("%f%f%f",&a,&b,&c)!=EOF){
if(a<b+c && b<a+c && c<a+b)
printf("能构成三角形\n");
else
printf("不能构成三角形\n");
}
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");
system("pause");

return 0;
}

include<stdlib.h>

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

scanf("%d%d%d",&a1,&a2,&a3);
printf("al=%d,a2=%d,a3=%d\n",a1,a2,a3);

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

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

system("pause");
return 0;
}
``#include<stdio.h>

include<stdlib.h>

int main()
{
int year;

int s=1e9; 
double y;![](https://img2024.cnblogs.com/blog/3406616/202403/3406616-20240318125413337-1516028449.png)

y=0.5+s*1.0/(3600*24*365);
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 x,ans;

while(scanf("%lf",&x)!=EOF)
{
ans=pow(x,365);
printf("%.2f的365次方:%.2f\n",x,ans);
printf("\n");
}
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()
{
float a,b,c,s,area;

while(scanf("%f%f%f",&a,&b,&c)!=EOF)
{
s=(a+b+c)/2.0;
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;

}
`