• 欢迎光临~

# 实验二作业

```#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
char a;
while(scanf_s("%c",&a) != EOF)
{
switch (a)
{
case'r':printf("STOP!n"); break;
case'g':printf("GOGOGOn"); break;
case'y':printf("Wait a minuten"); break;
default:printf("Something must be wrongn"); break;
}
getchar();
}
return 0;
}```
`#include<stdio.h>`
```#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int main()
{
int line, col;
for (line = 1; line <= 9; line++)
{
for (col = 1; col <= line; col++)
{
int a;
a = line * col;
printf("%d*%d = %.2d  ",col,line,a);
}
printf("n");
}
return 0;
}```

```#include<stdio.h>
#include<stdlib.h>
#include<math.h>
int ba1(int);
int ba2(int);
int ba3(int);
int main()
{
int a,b;
scanf_s("%d",&a);
for (b = a; b >= 1; b--)
{
int c;
for (c = a; c > b; c--)
printf("t");
ba1(b);
for (c = a; c > b; c--)
printf("t");
ba2(b);
for (c = a; c > b; c--)
printf("t");
ba3(b);
printf("n");
}
return 0;
}
int ba1(int a)
{
int b;
for (b = 2 * a - 1; b >= 1; b--)
{
printf(" o t");
}
printf("n");
}
int ba2(int a)
{
int b;
for (b = 2 * a - 1; b >= 1; b--)
{
printf("<H>t");
}
printf("n");
}
int ba3(int a)
{
int b;
for (b = 2*a-1; b >= 1; b--)
{
printf("I It");
}
printf("n");
}```

```
#include<stdlib.h>
#include<math.h>
int main()
{
int n, a;
double  c, b;
while (scanf_s("%d%d", &n,&a) != EOF)
{
int d = 0;
double s = 0;
for (c=1; c <= n; c++)
{
d = 10*d + a;
b = c / d;
s += b;
}
printf("n = %d,a = %d,s = %lfn", n, a, s);
}
return 0;
}```

```#include<stdio.h>
#include<stdlib.h>
#include<time.h>
int main()
{
printf("猜猜2022年11月的Lucky day是哪天n开始喽，你有三次机会n");
srand(time(0));
int a, b, c;
b = rand() % 30 + 1;
for (a = 1; a <= 3; a++)
{
scanf_s("%d",&c);
if (c < b)
printf("你猜的日期早了，还没到Lucky day呢n");
if (c > b)
printf("你猜的日期晚了，Lucky day已经过了n");
if (c == b)
{
printf("哇，猜中了，不愧是你呀n");
break;
}
if (a == 3)
printf("次数用完了，偷偷告诉你吧，Lucky day是 %d",b);
}
return 0;
}```