实验1

task1

include <stdio.h>

int main()
{
printf(" O O \n");
printf(" \n");
printf("I I I I\n");

return 0;

}

task2

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;

}

task3

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();

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' & ans2=='y' || ans1=='Y' & ans2=='Y' || ans1=='y' & ans2=='Y' || ans1=='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;

}




ans2=getchar();起缓冲作用

task4

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 = %lf, y = %lf\n",x, y);

return 0;

}

task5

include <stdio.h>

int main()
{
int year;
year=1e9/(60.060.024.0*365.0)+0.5;

printf("10亿秒约等于%d年\n",year);

return 0;

}

task6

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;

}

task7

include <stdio.h>

int main()
{
double f,c;

while(scanf("%lf",&c)!=EOF)
{
    f=c*9.0/5+32;
    
    printf("摄氏度c=%.2f时，华氏度f=%.2f\n",c,f);
    printf("\n");
}
return 0;

}

task8

include <stdio.h>

include <math.h>

int main()
{
int a,b,c;
double s,area;
while(scanf("%d%d%d",&a,&b,&c)!=EOF)
{
s=(a+b+c)/2.0;
area=sqrt(s(s-a)(s-b)*(s-c));
printf("a=%d,b=%d,c=%d,area=%.3f\n",a,b,c,area);
printf("\n");
}
return 0;
}