C++指针操作举例

C++指针操作举例，具体代码如下：

 

#include <stdlib.h>

#include <stdio.h>

#include <string.h>

void funcpp(char ** p)

{

    char *tmp;

    tmp = malloc(sizeof(char) * 10);

    sprintf(tmp,"%.08d",1);

    *p = tmp;

}

void funcValue(char p)

{

    printf("funcValue=%c\n",p);

    p = 'M';

}

 

void funcp(char *p)

{

    p = "mary";

    printf("in funcp=%s\n",p);

}

int main(int argc,char *argv[])

{

   /* int nc = 1;

    nc++;

    char strnc[8];

    sprintf(strnc,"%08d",nc);

    printf("the formatted ncstr is %s\n",strnc);

    */

    char *p = "hunter";

    funcValue(*p);

    printf("after funcValue %s\n",p);

    funcp(p);

    printf("after funcp %s\n",p);

    funcpp(&p);

    printf("after funcpp %s\n",p);

    free(p);

}

output:

funcValue=h

after funcValue hunter

in funcp=mary

after funcp hunter

after funcpp 00000001