实验1 C语言输入输出和简单程序编写

实验任务1_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;
 } 

 实验任务1_2

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

实验任务2

#include<stdio.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");
	    
	return 0;
 } 

实验任务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; 
 } 

getchar();的作用是消除回车对结果的影响

实验任务4

#include<stdio.h>
int main()
{
	
	double x, y;
	char c1, c2, c3;
	int a1, a2, a3;
	
	scanf("%d%d%d", &a1, &a2, &a3);//缺少地址运算符& 
	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);//double对应的应为lf 
	printf("x = %lf, y = %lf\n",x, y);
	
	return 0;

 } 

实验任务5

#include<stdio.h>
int main()
{
	int year;
	year = 1000000000.0/(365.0*24.0*60.0*60.0)+0.5;
	
	printf("10亿秒约等于%d年\n",year);
	return 0; 
 } 

实验任务6

#include<stdio.h>
#include<math.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");
	}
	
	return 0;
}

实验任务7

#include<stdio.h>
int main()
{
	double C, F;
	
	while(scanf("%lf",&C) != EOF)
	{
		F = 9*C/5+32;
		printf("摄氏度c=%.2lf时， 华氏度f=%.2lf\n", C,F);
		printf("\n");
	}
	
	return 0;
 } 

实验任务8

#include<stdio.h>
#include<math.h>
int main()
{
	int a, b, c;
	double s, S, area;
	
	
	while(scanf("%d%d%d", &a, &b, &c) != EOF)
	{
		s = (a+b+c)/2;
	    S = s*(s-a)*(s-b)*(s-c);
	    area = sqrt(S);printf("a = %d, b = %d, c = %d, area = %.3lf\n", a, b, c, area);
	    printf("\n");
		
	}
	
	
	return 0;
}