void del_char(char str[], char c)
{
    int i = 0, j = 0;
    while(str[i] != '\0')
    {
        if(str[i] != c)
        {
            str[j++] = str[i++];
        }

        else

        {

            i++;

        }
    }
    str[j] = '\0';
}
另外，Java版实现：

private static String delAllCharFromString(String str, char c) {
     StringBuffer sb = new StringBuffer(str);
     for (int i = 0; i < sb.length() - 1; i++) {
      if (sb.charAt(i) == c) {
       sb.deleteCharAt(i);
      }
     }
     return sb.toString();
    }