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相同点:
char型指针和int型指针，指针变量本身都是占4个字节的内存空间，可以通过sizeof(char*)或者sizeof(int*)来得到占用的字节空间数，存放的都是一个32位的地址值。
不同:
char指针类型和int指针类型在做算术运算的时候，地址值的变化是不一样的。
例如，
char *pointer_c; //假设ps存放的地址值是0x1000 pointer_c++;
//pointer_c自增加1，则pointer_c存放的地址值就变为了0x1001，因为char类型是占一个字节
//也就是说，pointer_c指向了下一个char型的内存地址。 int *pointer_i;
//如果是int型指针，假设初始也是0x1000 pointer_i++;
//pointer_i自增加1，则pointer_i存放的地址值就变为了0x1004，因为int类型是占4个字节，
//也就是说，pointer_i指向了下一个int型的内存地址。
从上面可以看出，指针变量之所以有类型，是方便指针变量在进行指针移动的时候，它是按照数据类型所占用的内存空间的字节数的倍数关系进行移动的
，pointer_i=pointer_i+4，则pn移动的字节数实际上是sizeof(int)4=4
4=16个字节数，这样做，那么用指针访问内存中的数据就显得很是方便了,是吧。
还有一点就是，内存地址空间一般是按照字节来编址的，即一个字节编一个号码，这个号码就是这个字节的地址，这个地址是具有唯一性的。
示例演示及结果：
