实验

task1

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


		return 0;
}

task1.1

#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;
}

task 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表示没敲）： ");
	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;
}

task4

#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 ,1,&c2,1, &c3,1);
	printf("c1 = %c,c2 = %c, c3 = %c\n", c1, c2, c3);

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

		return 0;
}

task5

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

int main()
{
	int year;

	year = 1000000000.0 / 31536000 + 0.5;

	printf("10亿秒约等于%d年\n", year);
	return 0;
}#include <stdio.h>
#include <math.h>

int main()
{
	int year;

	year = 1000000000.0 / 31536000 + 0.5;

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

task 6.1

#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;

}

task6.2

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

int main()
{
	double x, ans;

	while(scanf_s("%lf", &x)!= EOF)
	{
		ans = pow(x, 365);
		printf("%.2f的365次方：%.2f\n", x, ans);
		printf("\n");
	}
	return 0;

}

task7

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

int main()
{
	double C, F;

	while(scanf_s("%lf", &C)!= EOF)
	{
		F = 1.8*C+32;
		printf("当摄氏度c = %.2f时，华氏度f = %.2f",C ,F);
		printf("\n");
	}
	return 0;

}

task8

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

int main()
{
	double area;
	int a, b, c,s;

	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=%.3f",a, b, c, area);
		printf("\n");
	}
	return 0;

}