C语言程序设计教程（第三版）课后习题10.7 （C语言代码）指针

解题思路:

注意事项:

参考代码:

#include <stdio.h>

#include <string.h>

#include <malloc.h>

void copystr(char* p1,char* p2,int m)

{ 

    int k = 0;

    while(k<m-1)

    {

        k++;

        p1++;

    }

    while(* p1 !='\0')

    {

        * p2 = *p1;

        p1++;

        p2++;

    }

    *p2 = '\0';

}

int main()

{

    int n, m;

    scanf( "%d", &n );

    getchar();

    char *a, *b;

    a = (char *) malloc( n * sizeof(char) );

    b = (char *) malloc( n * sizeof(char) );

    gets( a );

    scanf( "%d", &m );

    copystr(a,b,m);

    puts( b );

    return(0);

}