实验一

`#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;

}`

`#include<stdio.h>
int main()
{

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




return 0;

}`

`#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;

}`

`#include<stdio.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表示没有):");
ans1 = getchar();

getchar();

printf("\n动手敲代码了没？(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;

第二个问题回答不到，回答第一个问题后会直接出结果
能使我们换行回答第二个问题

`#include<stdio.h>

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

scanf_s("%d%d%d", &a1, &a2, &a3);//传递变量的地址
printf("a1=%d,a2=%d,a3=%d\n", a1, a2, a3);

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

scanf_s("%lf,%lf", &x, &y);//两个变量类型要相同
printf("x=%lf,y=%lf\n", x, y);

return 0;

}//老师，我这个结果打出来就是不对，全部输入后会乱码`

`#include<stdio.h>

include<math.h>

int main() {
int year;

long long total_seconds = 1000000000;

int seconds_per_year = 31536000;

double years_double = (double)total_seconds / seconds_per_year;

year = (int)round(years_double);

printf("10亿秒约等于%d年\n", year);

return 0;

}`

`#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;

}`

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

while (scanf_s("%lf", &c) != EOF) {
	f = (9.0 / 5) * c + 32;
	printf("摄氏度c=%.2f时，华氏度f=%.2f\n", c, f);
}

return 0;

}`

`#include<stdio.h>

include<math.h>

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

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\n",a,b,c,area );
}

return 0;

}`