根据指针用法: * 定义一个指针， &取变量地址，
int b = 1;
int *a = &b;
则*a =1，但对于字符串而言并非如此，直接打印指向字符串的指针打印的是地址还是字符串本身，具体看情况。
定义：
char *m1 = "coconut is lovely";
char *m2 = "passion fruit isnice";
char *m3 = "craneberry is fine";
注：实际声明应该是const char *m1，原因char *背后的含义是：给我个字符串，我要修改它，此处应该是要读取它，具体参考
测试输出：
用cout 打印*m1:
cout<<"Now use cout to print *m1="<<*m1<<endl;
打印输出：
Now use cout to print *m1=c
即输出m1指向字符串的第一个字符。
用cout打印m1:
cout<<"Now use cout to print m1="<<m1<<endl;
输出：
Now use cout to print m1=coconut is lovely
即输出m1所指的内容，而不是m1指向的地址
用printf打印%c\n", *m1：
printf("Now use printf to print *m1=%c\n", *m1);
输出：
Now use printf to print *m1=c
即为m1指向的字符串的第一位的内容，但注意是%c而不是%s。因为是字符型，而非字符串型。所以以下表达错误: printf("Now use printf to print *m1= %s\n", *m1);
用printf 打印 %d m1
printf("Now use printf to print m1=%d\n", m1);
输出:
Now use printf to print m1=4197112
即m1是指针，输出m1所指向的地址。上面例子中的cout<<m1输出的是字符串内容。二者不一致，似乎反常了。但是我们可以使得它们行为一致。如下:
用printf打印%s m1：
printf("Now use printf to print m1= %s\n",m1);
输出：
Now use printf to print m1= coconut is lovely
即m1是指针，输出m1所指向的地址。使用%s而非%d就可以使得m1不去表示地址而去表示字符串内容。
完整例子：
#include <stdio.h>
#include <iostream>
using namespace std; int main()
{
char *m1 = "coconut is lovely";
char *m2 = "passion fruit isnice";
char *m3 = "craneberry is fine";
char* message[];
int i; //cout *m1
cout<<"Now use cout to print *m1="<<*m1<<endl;
//cout m1
cout<<"Now use cout to print m1="<<m1<<endl;
//cout (int)m1： 64位机char*类型大小位8B，用long转换
cout<<"Now use cout to print m1="<<(int)m1<<endl;
//printf %c *m1
printf("Now use printf to print *m1=%c\n", *m1);
//printf %s *m1
// printf("Now use printf to print m1= %s\n",*m1);
//printf %d m1
printf("Now use printf to print m1=%d\n", m1);
//printf %s m1
printf("Now use printf to print m1= %s\n",m1);
/*
message[0] = m1;
message[1] = m2;
message[2] = m3; for (i=0; i<3; i++)
printf("%s\n", message[i]);
*/
}
输出：
Now use cout to print *m1=c
Now use cout to print m1=coconut is lovely
Now use cout to print m1=4197320
Now use printf to print *m1=c
Now use printf to print m1=4197320
Now use printf to print m1= coconut is lovely
Ref:
- http://blog.csdn.net/feliciafay/article/details/6818009