实验1

任务1

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#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");
    printf(" O \n");
    printf("<H>\n");
    printf("I I\n");
    
    printf(" O      0\n");
    printf("<H>    <H>\n");
    printf("I I    I I\n");


    return 0;
}

任务2

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#include <stdio.h>
int main() {
	double a, b, c;
	scanf("%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;

}

任务3

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#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, ans2 = 'y' || ans1, 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;

}

任务4

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#include <stdio.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, 1u, &c2, 1u, &c3, 1u);
	printf("c1 = %c, c2 = %c, c3 = %c\n", c1, c2, c3);

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

	return 0;


}

任务5

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#include <stdio.h>
int main() {
	long long year, a;
	long long b = 3600LL * 24 * 365;
	a = 1000000000LL % b;
	year = 1000000000LL / b;

	if (a <= b / 2)
		printf("10亿秒约等于%lld年\n", year);
	else {
		year++;
		printf("10亿秒约等于%lld年\n", year);
	}
	 
	return 0;
}

任务6

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#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;
}

任务7

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#include <stdio.h>
#include <math.h>
int main() {
    double c, f;

    while (scanf("%lf", &c) != EOF)
    {
        f = 9.0 / 5.0 * c + 32.0;
        printf("摄氏度c = %lf时，华氏度f = %lf\n", c, f);
        printf("\n");
    }

    return 0;
}

任务8

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#include <stdio.h>
#include <math.h>
int main() {
	double a, b, c, s, area;
	

	while (scanf("%lf%lf%lf", &a, &b, &c) != EOF) {
		s = (a + b + c) / 2;
		area = sqrt(s * (s - a) * (s - b) * (s - c));
		printf("a = %lf, b = %lf, c = %lf, area = %lf\n", a, b, c, area);
		printf("\n");

	}
	return 0;
}