我自己做过了但是总是出错~~~他要求 INPUT "LOAN AMOUNT";10000
                                  INPUT "YEARLY INTEREST RATE"; 0.179
                                  INPUT "MONTHLY PAYMNET"; 1000
然后得出下表
BEGINNING    PAYMENT     INTEREST    PRINCIPAL    ENDING
BALANCE                                           BALANCE 
---------    --------    --------    ----------   --------
10000        1000        149.17       850.83      9149.16
9149.16      1000        136.47       863.52      8285.64
8285.64      1000        123.59       876.41      7409.75
7409.23      1000        110.52       889.48      6519.75
………………………………
1869.33      1000         27.88       972.12       879.21
897.21       897.21        0.00       897.21         0.00

提示
INTEREST=BEGINNING BALANCE * YEARLY RATE / 12
PRINCIPAL = MONTHLY PAYMENT - MONTHLY INTEREST
BEGINNING BALANCE = PREVIOUS MONTH ENDING BALANCE
IF BEGINNING BALANCE <= MONTHLY PAYMENT THEN
INTEREST = 0
MONTHLY PAYMENT = PRINCIPLE
拜托各位了~~~~我做了~~就是做不出来很烦：（