C / C++ / MFC

void StrDelete1(char ch[], int pos,int len)
/*from the index pos in ch[],delete the the string of len*/
{
    if (pos<0 || pos >(MAX-len))
        {
            printf("the string delete error!");
            exit(1);
        }
    int i;
    for (i=0; i<MAX; i++)
    printf("%c", ch[i]);

    char *temp = (char*)malloc(sizeof(char));
    if (temp == NULL)
    {
       exit(1);
    }
    for (i=pos; i<MAX-len; i++)
    {
        temp = &ch[i];
         free(temp);
    }
    
    printf("\n");
       for(i=0; i<MAX; i++)
    printf("%c", ch[i]);
}

void StrDelete2(char ch[], int pos,int len)
{
   if (pos<0 || pos >(MAX-len))
        {
            printf("the string delete error!");
            exit(1);
        }
    int i;
    printf("\n");
    for (i=0; i<MAX; i++)
    printf("%c", ch[i]);

    char *temp = (char*)malloc(MAX-len);
    if (temp == NULL)
    {
       exit(1);
    }
    for (i=0; i<pos; i++)
    temp[i] = ch[i];
    for (i=pos; i<MAX-len; i++)
    {
        temp[i]=ch[i+len];
    }
    free(ch);
    printf("\n");
    for (i=0; i<MAX-len; i++)
    printf("%c", temp[i]);
}