实验1

实验1
task1_1.c

include <stdio.h>

int main()
{
int n = 2;
while (n--) {
printf(" O \n");
printf("\n");
printf("I I\n");
}
return 0;
}

task2_1.c

include <stdio.h>

int main()
{

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

}

实验2

include<stdio.h>

int main() {
double a,b,c;
scanf("%lf%lf%lf",&a,&b,&c);
if (a>0 && b>0 && c>0 && a+b >c && b+c >a &&a +c >b)
printf("能构成三角形\n");
else
printf("不能构成三角形\n");
return 0;
}

实验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;
}

实验4

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

scanf("%lf %lf", &x, &y);
printf("x = %1f, y = %1f\n",x, y);
return 0;

}

实验5

include <stdio.h>

int main() {
int year,second = 1000000000;
year = 1.0second/(606024365) +0.5;
printf("10亿秒约等于%d年\n", year);
return 0;
}

实验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7

include <stdio.h>

include <math.h>

int main() {
double F, C;
while(scanf("%lf", &C) == 1)
{
F = 9.0*C/5 + 32;
printf("%.1lf\n", F);
printf("\n");
}

return 0;

}

实验8

include <stdio.h>

include <math.h>

int main()
{
int a, b, c;
double p, area;
while (scanf("%d %d %d", &a, &b, &c) == 3)
{
p = 1.0*(a + b + c) / 2;
area = sqrt(p * (p - a) * (p - b) * (p - c));
printf("a=%d,b=%d,c=%d,area=%.3lf\n", a, b, c, area);
}
return 0;
}