复利计算4.0 





  1 #include<stdio.h>
  2 #include<stdlib.h>
  3 #include<math.h>
  4 void view()
  5 {
  6     printf("              |---------------------------------------------|\n");
  7     printf("              |                 单/复利计算                 |\n");
  8     printf("              |---------------------------------------------|\n");
  9     printf("              |1.单利计算                                   |\n");
 10     printf("              |---------------------------------------------|\n");
 11     printf("              |2.复利计算                                   |\n");
 12     printf("              |---------------------------------------------|\n");
 13     printf("              |3.求年限                                     |\n");
 14     printf("              |---------------------------------------------|\n");
 15     printf("              |4.求年利率                                   |\n");
 16     printf("              |---------------------------------------------|\n");
 17     printf("              |5.固定存钱                                   |\n");
 18     printf("              |---------------------------------------------|\n");
 19     printf("              |6.贷款                                       |\n");
 20     printf("              |---------------------------------------------|\n");
 21     printf("              |0.退出系统                                   |\n");
 22     printf("              |---------------------------------------------|\n");
 23 }
 24 
 25 void danli()
 26 {
 27     int i,years;      //存钱年数
 28     double money,r,sum;   //本金,年利率
 29     printf("请输入本金:");
 30     scanf("%lf",&money);
 31     printf("请输入存钱年数:");
 32     scanf("%d",&years);
 33     printf("请输入利率:");
 34     scanf("%lf",&r);
 35     for(i = 1 ; i<=years; i++)
 36     {
 37         sum = r*i*money+money;  
 38         printf("存入第%d年后的存款总额为:%.2lf\n\n\n",i,sum);
 39     }
 40 }
 41 
 42 void year()
 43 {
 44     int i,years,N=100;
 45     double money,r,sum,A,B,C;
 46     printf("请输入本金:");
 47     scanf("%lf",&money);
 48     printf("请输入目标金钱:");
 49     scanf("%lf",&sum);
 50     printf("请输入利率:");
 51     scanf("%lf",&r);
 52     C=A=1+r;
 53     B=sum/money;
 54     for(i=1;i<N;i++)
 55     {
 56        C=C*A;
 57        if(C>=B)
 58        {
 59           break;
 60        }
 61     }
 62     years=i+1;
 63     printf("所需年数为%d\n\n\n",years);
 64 }
 65 
 66 void nianlilv()
 67 {
 68     int years;      
 69     double money,r,sum,B,y;  
 70     printf("请输入本金:");
 71     scanf("%lf",&money);
 72     printf("请输入存钱年数:");
 73     scanf("%d",&years);
 74     printf("请输入目标金钱:");
 75     scanf("%lf",&sum);
 76     B=sum/money;
 77     y=1.0/years;
 78     r=pow(B,y)-1;
 79     printf("所求年利率为:%-.3lf\n\n\n",r);
 80 }
 81 
 82 void dingtou1()
 83 {
 84     int years,i;      
 85     double money,r,Money,v; 
 86     printf("每月投入本金:");
 87     scanf("%lf",&money);
 88     printf("请输入存钱年数:");
 89     scanf("%d",&years);
 90     printf("请输入年利率:");
 91     scanf("%lf",&r);
 92     money=money*12;
 93     for(i=1;i<=years;i++)
 94     {
 95          v=pow(1+r,i);
 96     }
 97     Money=money*(1+r)*(-1+v)/r;
 98     printf("%d年后本金和利息之和为:%lf\n\n\n",years,Money);
 99 }
100 
101 void dingtou2()
102 {
103     int years,i;      
104     double money,r,Money,v; 
105     printf("每年投入本金:");
106     scanf("%lf",&money);
107     printf("请输入存钱年数:");
108     scanf("%d",&years);
109     printf("请输入年利率:");
110     scanf("%lf",&r);
111     for(i=1;i<=years;i++)
112     {
113         v=pow(1+r,i);
114     }
115     Money=money*(1+r)*(-1+v)/r;
116     printf("%d年后本金和利息之和为:%lf\n\n\n",years,Money);
117 }
118 
119 void daikuan()
120 {
121     int years,i;      
122     double money,r,Money,v; 
123     printf("贷款数目:");
124     scanf("%lf",&Money);
125     printf("还钱期限(年):");
126     scanf("%d",&years);
127     printf("请输入年利率:");
128     scanf("%lf",&r);
129     for(i=1;i<=years;i++)
130     {
131         v=pow(1+r,i);
132     }
133     money=Money*r/(-1+v)/(1+r);
134     money=money/12;
135     printf("每月等额本息应还款:%lf\n\n\n",money);
136 }
137 
138 void SUM()
139 {
140     int years,i;      
141     double money,r,v,sum;
142     printf("请输入本金:");
143     scanf("%lf",&money);
144     printf("请输入存钱年数:");
145     scanf("%d",&years);
146     printf("请输入利率:");
147     scanf("%lf",&r);
148     for(i = 1 ; i<=years; i++)
149     {
150        v=pow(1+r,i);
151        sum = v*money;  
152        printf("存入第%d年后的存款总额为:%.2lf\n",i,sum); 
153     }
154 }
155 
156 void benjin()
157 {
158     int years,i;      
159     double money,r,v,sum;
160     printf("请输入目标金钱:");
161     scanf("%lf",&sum);
162     printf("请输入存钱年数:");
163     scanf("%d",&years);
164     printf("请输入利率:");
165     scanf("%lf",&r);
166     for(i = 1 ; i<=years; i++)
167     {
168        v=pow(1+r,i);
169     }
170     money=sum/v;  
171     printf("现在必须存入本金为:%.2lf\n\n\n",money);
172 }
173 
174 main()
175 {
176     int n;
177     while(1)
178     {
179 la1:view();
180         printf("请选择(0-6):");
181         scanf("%d",&n);
182         switch(n)
183         {
184     case 1:
185         danli();
186         break;
187     case 2:
188         printf("请选择:\n");
189         printf("1.通过本金求存款总额\n");
190         printf("2.通过目标总额求本金\n\n");
191         scanf("%d",&n);
192         switch(n)
193         {
194         case 1:
195            SUM();
196             goto la1;
197         case 2:
198             benjin();
199             goto la1;
200         }
201         case 3:
202             year();
203             break;
204         case 4:
205             nianlilv();
206             break;
207         case 5:printf("1.每月定投\n");
208                printf("2.每年定投\n");
209                scanf("%d",&n);
210             switch(n)
211             {
212             case 1:
213             dingtou1();
214             goto la1;
215             case 2:
216                 dingtou2();
217                 goto la1;
218             }
219             case 6:
220                 daikuan();
221                 break;
222 
223     case 0:
224         n=0;exit(0);
225     }
226     }
227 }






 


 






这个程序主要增加了贷款这个功能，并且设置了循环的功能，使得程序能根据使用者意愿执行所需的功能，不会自动退出。






            

            
posted @ 
2016-03-20 22:17 
14冯梓凡 
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