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#include "stdio.h"

#include "string.h"

#include "windows.h"

char reg_name[30]="",reg_pwd[10]="";

char on_name[30],on_pwd[10];

void regist()

{

system("pause");

system("cls");

printf("\n\n\t\t\t欢迎使用红包注册系统\n\n");

while(1)

{

printf("\t\t请输入用户名[不能大于10个字符]：");

scanf("%s",reg_name);

if(strlen(reg_name)<=10)

{

while(1)

{

printf("\n\t\t请输入密码[密码长度为八位]：");

scanf("%s",reg_pwd);

if(strlen(reg_pwd)==8)

{

printf("\n\n\t\t注册成功，您的用户名是%s,密码是%s\n\n",reg_name,reg_pwd);

break;

}

else

{

printf("\n\t\t密码的长度为%d，请重新输入\n",strlen(reg_pwd));

}

}

break;

}

else

{

printf("\n\t\t用户名的长度为%d，请重新输入\n\n",strlen(reg_name));

}

}

}

int judge()

{

if(strcmp(reg_name,"")==0&&strcmp(reg_pwd,"")==0)

{

printf("\n\n\t\t您尚未注册，请先注册！\n\n");

return 0;

}

else

{

return 1;

}

}

void dl()

{

int i;

system("pause");

system("cls");

printf("\n\n\t\t\t欢迎使用红包登录系统\n\n");

for(i=1; i<=3; i++)

{

printf("\t\t请输入用户名:");

scanf("%s",on_name);

printf("\n\t\t请输入密 码:");

scanf("%s",on_pwd);

if(strcmp(reg_name,on_name)==0&&strcmp(reg_pwd,on_pwd)==0)

{

printf("\n\n\t\t登录成功，欢迎使用红包系统\n\n");

break;

}

else

{

printf("\n\n\t\t登录失败，请重新登录，您还有%d次机会\n\n",3-i);

}

}

}

void main()

{

int id;

while(1)

{

system("pause");

system("cls");

printf("\n\n\t\t\t红包管理系统\n\n");

printf("\t\t\t1:注册\n");

printf("\t\t\t2:登录\n");

printf("\t\t\t0:退出\n\n");

printf("\t\t请选择功能编号：");

scanf("%d",&id);

switch(id)

{

case 1:

regist();

break;

case 2:

if(judge()==1)

{

dl();

}

break;

case 0:

exit(1);

break;

default:

printf("\n\t\t您输入的功能编号有误，请重新输入！\n");

}

}

}

void start()

{

system("color A");

while(1)

{

float a[25];

float total;

printf("\t\t\t欢迎使用红包分发系统\n\n\n");

printf("请输入红包的总额:\n");

scanf("%f",&total);

int num;

printf("请输入红包的个数:(1~20之间)\n");

scanf("%d",&num);

float min=0.01;

int i=0,j;

float t;

float MAX=0;

float safe_total=0;

float sum=0;

srand(time(NULL));

for(i=1;i

{

t=total/(num-i+1);

safe_total=t*2;

a[i]=(rand()%(int)(safe_total*100)+(int)min*100)/100.0+min;

total-=a[i];

sum+=a[i];

printf("\t\t第%d个红包有%0.2f元\n",i,a[i]);

if(a[i]>MAX)

{

MAX=a[i];

j=i;

}

}

a[i]=total;

printf("\t\t第%d个红包有%0.2f元\n\n\n\n",i,a[i]);

if(total>MAX)

{

printf("\t\t第%d个同学是运气王,抢到了0.2f元的金额\n\n\n",num,total);

}

else

{

printf("\t\t第%d个同学是运气王,抢到了%0.2f元的金额\n\n\n",j,MAX);

}

system("pause");

system("cls");

}

return 0;

}