习题8-6 删除字符

 1 void delchar(char *str, char c)
 2 {
 3     int i, j;
 4     char a[MAXN];
 5 
 6     j = 0;
 7     for (i = 0; str[i] != '\0'; i++)
 8     {
 9         if (str[i] != c)
10         {
11             a[j] = str[i];
12             j++;
13         }
14     }
15     a[j] = '\0';
16     
17     for (i = 0; a[i] != '\0'; i++)
18     {
19         str[i] = a[i];
20     }
21     str[i] = '\0';
22 }