71. C++ 分别用指针数组和二维数组生成二维空间，存储数据并释放。 练习new/delete, new[]/delete[]

             1 #include <iostream>
 2 #include <stdio.h>
 3usingnamespace std;
 4 5 6int main()
 7{
 8#if 0 //生成二维数组存储 9     FILE* fp = fopen("G:\\qtcode\\temp.txt","r");
1011//char buf[3][10] ={0};12char (*buf)[10] = newchar[3][10];
1314int i,j,ch;
15for(i = 0;i<3;i++)
16    {
17for(j = 0;j<8;j++)
18        {
19             ch = fgetc(fp);
20if(ch == ‘\n‘ || ch == EOF)
21break;
22             buf[i][j] = ch;
23        }
24         buf[i][j] = ‘\0‘;
25    }
2627for(i = 0;i<3;i++)
28    {
29        cout<<buf[i]<<endl;
30    }
31delete []buf;
32    fclose(fp);
33#endif3435#if 1 //生成指针数组存储36     FILE* fp = fopen("G:\\qtcode\\temp.txt","r");
3738char **buf = newchar*[3];
39int i,j,ch;
40for(i = 0;i<3;i++)
41    {
42         *(buf+i) = newchar[8] ;
43for(j = 0;j<8;j++)
44        {
45             ch = fgetc(fp);
46if(ch == ‘\n‘ || ch == EOF)
47break;
48             buf[i][j] = ch;
49        }
50         buf[i][j] = ‘\0‘;
51    }
52for(i = 0;i<3;i++)
53    {
54        cout<<buf[i]<<"***"<<endl;
55delete [](*(buf+i));
56//   delete[] (buf[i]);57    }
58delete []buf;
59    fclose(fp);
6061#endif62return0;
63 }