实验一

include<stdio.h>

include<stdlib.h>

int main()
{
printf(" o o \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\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、课后认真复习了没？（输入y或Y表示有，输入n或N表达没有））：");
ans1=getchar();
getchar();
printf("\n动手敲代码了没？（输入y或Y表示有，输入n或N表达没有）：");
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<stdio.h>

include<stdlib.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);
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;
year=1000000000/60/60/24/365;
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<stdlib.h>

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

include<stdio.h>

include<stdlib.h>

include<math.h>

int main()
{
int a,b,c;
double area,s;
while(scanf("%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=%.3f",a,b,c,area);
printf("\n");
}
system("pause");
return 0;
}