OldBalance        = PR;
     MonthlyPayment    = MP;
     Interestpaid      = OldBalance * IM;
     Principalpaid     = MP - (OldBalance * IM);
     NewBalance        = OldBalance - Principalpaid;



for(Month=1;;Month++);

printf("\nMonth     Banlace        Payment        paid          paid          Balance\n");
     printf("=====    =========      =========     =========     =========      =========\n");
     printf(" %d      %2lf    %2lf    %2lf      %2lf       %2lf\n", Month, OldBalance, MonthlyPayment, Interestpaid, Principalpaid, NewBalance);

这段是关于还款程序的代码
这个for 怎么写才能循环计算 OldBalance=0？

for(Month=1;;Month++);死循环，Month没有结束条件，而且后面加一个分号干啥。

for(Month=1;Month<=12;Month++){
     printf("\nMonth     Banlace        Payment        paid          paid          Balance\n");
     printf("=====    =========      =========     =========     =========      =========\n");
     printf(" %d      %2lf    %2lf    %2lf      %2lf       %2lf\n", Month, OldBalance, MonthlyPayment, Interestpaid, Principalpaid, NewBalance);

    //这里面再加点运算
}