阅读以下说明和C++程序，将应填入(n)处的字句写在对应栏内。【C++程序】#include ＜ stdio. h ＞#include ＜ string. h ＞#define Max 1000class Bank{ int index; char date [Max] [10]; // 记录交易日 iht amount[Max]; // 记录每次交易金额，以符号区分存钱和取钱 int rest[ Max]; // 记录每次交易后余额 static iht sum; // 账户累计余额public: Bank( ) {index =0;} void deposit( char d[ ] , int m) //存入交易 { strcpy ( date [ index ], d); amount[ index] = m; (1) ; rest[ index] = sum; index++; } void withdraw (char d[ ], int m) //取出交易 { strcpy( date[ index] ,d); (2) ; (3) ; rest[ index] = sum; index++; } void display( );};int Bank:: sum = 0;void Bank:: display ( ) //输出流水{ int i; printf("日期 存入 取出 余额\n"); for (4) { printf(" %8s" ,date[i] ); if (5) printf(" %6d" , -amount[i] ); else printf( "%6d ",amount[i] ); printf( "% 6d\n" ,rest[i] ); } }void main( ){ Bank object; object. deposit ( "2006.2.5", 1 00 ); object. deposit( "2006.3.2" , 200); object. withdraw( "2006.4.1", 50); object. withdraw( "2006.4.5", 80); object. display ( );}本程序的执行结果如下：日期 存入 取出 余额 2006.2.5 100 1002006.3.2 200 3002006.4.1 50 2502006.4.5 80 170