// Local Declaration
    double round2 (double);
    int NY;
    int NM;
    int PR;
    double IM, P, Q, MP, IY;

    NM = NY*12;
    IM = IY / 12 / 100;
    P  = pow(NM,(1+IM));
    Q  = (P/(P-1));
    MP = PR * IM * Q;

    // Statements
    printf("The amount of the loan (principal) :");
    scanf("%d", &PR);
    printf("Interest rate / year (per cent) :");
    scanf("%lf", &IY);
    printf("Interest rate / month (decimal) : %lf\n", IM);
    printf("Number of years : ");
    scanf("%d", &NY);

    printf("Number of Months : %d\n", &NM);
这样写可是到了计算 IM的时候怎么是0？
到NY出来的却是2686712

[此贴子已经被作者于2016-10-26 22:34编辑过]

你还是上完整的代码吧。这样写别人看不懂。

最后出来的不是NM么，输出的是&NM地址,问题1没想出来

我还没写完的呢，我只是试着run一下

问题是我在run的时候无论输入多少 它显示结果还是2686712

我只写到这样

#include <stdio.h>
#include <math.h>


int main ()
{
   

    // Local Declaration
    double round2 (double);
    int NY;
    int NM;
    int PR;
    double IM, P, Q, MP, IY;

    NM = NY*12;
    IM = IY / 12 / 100;
    P  = pow(NM,(1+IM));
    Q  = (P/(P-1));
    MP = PR * IM * Q;

    // Statements
    printf("The amount of the loan (principal) :");
    scanf("%d", &PR);
    printf("Interest rate / year (per cent) :");
    scanf("%lf", &IY);
    printf("Interest rate / month (decimal) : %lf\n", IM);
    printf("Number of years : ");
    scanf("%d", &NY);

    printf("Number of Months : %d\n", &NM);

printf("Number of Months : %d\n", &NM);   //&

PR IY NY 是要先输入的.先执行计算却没有输入数据.那么计算会执行,但是数据随机. 所以改动部分代码位置即可
#include <stdio.h>
#include <math.h>
int main ()
{
     
     // Local Declaration
     double round2 (double);
     int NY;
     int NM;
     int PR;
     double IM, P, Q, MP, IY;

 
     // Statements
     printf("The amount of the loan (principal) :");
     scanf("%d", &PR);
     printf("Interest rate / year (per cent) :");
     scanf("%lf", &IY);
     scanf("%d", &NY);
     
     NM = NY*12;
     IM = IY / 12 / 100;
     P  = pow(NM,(1+IM));
     Q  = (P/(P-1));
     MP = PR * IM * Q;

     printf("Interest rate / month (decimal) : %lf\n", IM);
     printf("Number of years : ");
     
     printf("Number of Months : %d\n", NM);
 }

[此贴子已经被作者于2016-10-26 23:04编辑过]

明白了！！ 感谢大大，我再作修改