`#include<stdio.h>
include<stdlib.h>
include<time.h>
define N 5
int main()
{
int i,number;
srand( time(0) );
for(i = 0;i < N;++i)
{
number = rand()%65 + 1;
printf("20238331%04d\n",number);
}
system("pause");
return 0;
} #include<stdio.h>
include<stdlib.h>
int main()
{
char light;
while(scanf("%c",&light) != EOF)
{
switch(light){
case('r'):printf("stop!\n");break;
case('g'):printf("go go go\n");break;
case('y'):printf("wait a minute\n");break;
default:printf("someting must be wrong\n");
}
getchar();
}
system("pause");
return 0;
} #include<stdio.h>
include<stdlib.h>
int main()
{
int lucky_day,number = 0,day;
lucky_day = rand()%31 + 1;
printf("猜猜2024年5月哪一天是你的幸运日");
printf("开始喽，你有三次机会，猜吧");
while(1)
{
scanf("%d",&day);
if(day < lucky_day)
printf("你猜的日期早了，你的幸运日还没到呢");
else if(day > lucky_day)
printf("你猜的日期晚了，你的幸运日在前面哦");
if(day == lucky_day){
printf("wooooooo!猜中了，好厉害!");break;
}
number++;
if(number == 3)
printf("告诉你吧，你的幸运日是%d",lucky_day);
}
system("pause");
return 0;
} #include<stdio.h>
include<stdlib.h>
int main()
{
double s = 0;
int i,n,a,j;
while(scanf("%d",&n) != EOF)
{
s = 0;
scanf("%d",&a);
j = a;
for(i = 1;i <= n;i++)
{
s = s +(double) i/a;
a = 10*a +j;
}
printf("n = %d\n",n);
printf("a = %d\n",j);
printf("s = %lf\n",s);
}
system("pause");
return 0;
} #include<stdio.h>
include<stdlib.h>
int main()
{
int i,j,s;
for(i = 1;i <= 9;i++)
{
for(j = 1;j <= i;j++)
{
s = ij;
printf("%d%d=%d\t",i,j,s);
}
printf("\n");
}
system("pause");
return 0;
} #include<stdio.h>
include<stdlib.h>
int main()
{
int i,j = 0,n,line,count;
scanf("%d",&n);
line = n;
count = 0;
n = 2*n - 1;
for(line > 0;line--