c语言程序设计答案，怎样输入一个华氏温度，要求输出摄氏温度？

#include<stdio.h>

int main()

{

float F,c

while(1)

{

printf("请输入华氏温度：")

scanf("%f",&F)

c=5*(F-32)/9

printf("摄氏温度为：%0.2f",c)

return 0

}

}

#include

<stdio.h>

int

main()

{

int

y0,

m0,

d0,

y1,

m1,

d1,

age

while

(

scanf("%d%d%d%d%d%d",

&y0,

&m0,

&d0,

&y1,

&m1,

&d1

)

){

age

=

y1

-

y0

-

1

if

(

m1

>

m0

||

m1

==

m0

&&

d1

>=

d0

)

++age

printf("年龄为:%d周岁！\n",

age)

}

return

0

}

4.

#include

<stdio.h>

#include

<memory.h>

int

main()

{

char

p[500]

int

i,

count

while

(

scanf("%s",

&p)

){

count

=

0

for

(

i

=

0

i

!=

strlen(p)

++i

)

if

(

p[i]

>=

'a'

&&

p[i]

<=

'z'

)

++count

printf("%d\n",

count)

}

return

0

}

2.

#include

<stdio.h>

int

main()

{

int

n

while

(

scanf("%d",

&n)

){

if

(

(

n

&

1

)

==

0

)

printf("%d是偶数!\n",

n)

else

printf("%d,是奇数!\n",

n)

}

return

0

}

第三题（用EFO结束）？EOF吧？EOF已经是文件尾，怎样输出结果？