D/C + + development application: Palindrome string

Palindrome: A palindrome is the same string that is read and reread, for example: "Radar", "Able was I ere I saw Elba" and "a man a plan a canal Panama" (if spaces are omitted).

Write a recursive function testpalindrome that returns True when the string in the array is palindrome, or false. function ignores spaces and punctuation in a string.

#include <stdio.h>
/* 字符串 一半数 总个数*/
int charf(char d[],int k, int i)
{
if(d[k]==d[i-k]&&k==0)
return(1);
else if(d[k]==d[i-k])
charf(d,k-1,i); /*递归调用*/
else
return(0);
}
main()
{
int i=0,n=0;
char a,b[20];
while ((a=getchar())!='\n')
{
b[i]=a;
i++;
}
if(i%2==0)
n=charf(b,(i/2),i-1);
else
n=charf(b,(i/2-1),i-1);
if(n==0)
printf("不是回文");
else
printf("是回文");
getch();
}