三个数比较大小C程序

#include

#include

#include

void main()

{

float a,b,c,t,k;

char b1;

for(;;)

{

system("cls");

printf(" ╔═══════════════════════╗\n");

printf(" ║====>>╬==============================╬<<====║\n");

printf(" ║╭#╮║三个数不相同比较大小║╭#╮║\n");

printf(" ╒==╕║# # ╬═══════════════╬# #║\n");

printf(" ╞==╡║╰╯║【1】↙开始↘║╰╯║\n");

printf(" ╞菜╡╠║☆║╬═══════════════╬║☆║╣\n");

printf(" ╞==╡║▃▄║【2】↖退出↗║▄▃║\n");

printf(" ╞==╡║┣╋┫╬═══════════════╬┣╋┫║\n");

printf(" ╞单╡║┣╋┫╬==============================╬┣╋┫║\n");

printf(" ╞==╡║┣╋┫╬▲▲▲注意▲▲▲╬┣╋┫║\n");

printf(" ╘==╛║┣╋┫╬▲▲整数：六位▲▲╬┣╋┫║\n");

printf(" ║┣╋┫╬▲小数：六位▲╬┣╋┫║\n");

printf(" ║┗┻┛╬===========liangdabo==========╬┗┻┛║\n");

printf(" ╚═══════════════════════╝\n");

printf("\n\n");

b1=getchar();

switch(b1)

{

L1: case'1':

{

L3:

printf("\n\n");

printf(" 请输入要比较的三个小于6位数的不相同的数：");

scanf("%f%f%f",&a,&b,&c);

printf("\n\n");

printf(" a=%6.6f\n b=%6.6f\n c=%6.6lf\n",a,b,c);

L4:

printf(" 请确定输入正确按【9】不正确重新输入按【0】：");

scanf("%f",&k);

printf("\n\n");

if(k==9)

{

goto L2;

}

if(k==0)

{

goto L3;

}

else

{

goto L4;

}

L2: if(a

{

t=a;

a=b;

b=t;

}

if(a

{

t=a;

a=c;

c=t;

}

if(b

{

t=b;

b=c;

c=t;

}

if(a==b||a==c||b==c)

{

printf("\n\n输入错误\n\n 重新开始\n\n\n");

goto L1;

}

printf("\n\n");

printf(" 按由大到小排列：%6.6f>%6.6f>%6.6f\n\n",a,b,c);

printf(" 按由小到大排列：%6.6f<%6.6f<%6.6f\n",c,b,a);

printf("\n\n\n");

printf(" ╔══════════════╗\n");

printf(" ║☆☆☆║\n");

printf(" ║☆【学生：梁大波】║\n");

printf(" ║☆【学号：124077031026】║\n");

printf(" ║☆☆☆按【Enter】再║\n");

printf(" ║☆按【1】比较下一组║\n");

printf(" ║☆☆按【2】退出程序║\n");

printf(" ║☆☆☆║\n");

printf(" ╚══════════════╝\n\n\n");

}

break;

case'2':

{

printf(" ╔══L═══════D ═══════B═══╗\n");

printf(" ║═════☆☆☆谢谢使用！☆☆☆═════║\n");

printf(" ╚═════════════════════╝\n");

exit(0);

}

}

getch();

}

}