复利作业

  1 #include<stdio.h>
  2 #include<stdlib.h>
  3 #include<string.h>
  4 #include<math.h>
  5 int menu();//主菜单
  6 void fuli();//复利
  7 void danli();//单利
  8 void capital();//本金
  9 void time();//时限
 10 void rate();//利率
 11 void main()//主函数
 12 {
 13     int choice;
 14     choice=menu();
 15     while(1)
 16     {
 17         switch(choice)
 18         {
 19         case 1:
 20             fuli();
 21             break;
 22         case 2:
 23             danli();
 24             break;
 25         case 3:
 26             capital();
 27             break;
 28         case 4:
 29             time();
 30             break;
 31         case 5: 
 32             rate();
 33             break;
 34         }
 35         choice=menu();
 36     }
 37 }
 38 
 39 
 40 int menu()//主菜单
 41     {
 42         int choice;
 43         printf("\t\t\t********复利计算器********\t\t\t\n");
 44         printf("\t\t\t功能选择\t\t\t\n");
 45         printf("\t\t\t1.复利计算\t\t\t\n");
 46         printf("\t\t\t2.单利计算\t\t\t\n");
 47         printf("\t\t\t3.本金计算\t\t\n");
 48         printf("\t\t\t4.时间计算\t\t\t\n");
 49         printf("\t\t\t5.利率计算\t\t\t\n");
 50         printf("\t\t\t请输入1-5功能键:\t\t\t\n");
 51         while( (!(scanf("%d",&choice)))|| (choice<1)||(choice>5))//重新输入
 52         {
 53         printf("\n请重新选择:\n");
 54         printf("\t\t\t功能选择\t\t\t\n");
 55         printf("\t\t\t1.复利计算\t\t\t\n");
 56         printf("\t\t\t2.单利计算\t\t\t\n");
 57         printf("\t\t\t3.本金计算\t\t\n");
 58         printf("\t\t\t4.时间计算\t\t\t\n");
 59         printf("\t\t\t5.利率计算\t\t\t\n");
 60         printf("\t\t\t请输入1-5功能键:\t\t\t\n");
 61         }
 62         return choice;
 63     }
 64     
 65 
 66 
 67 void jisuan()//计算公式
 68     {
 69         printf("复利计算公式\n");
 70         printf("F=P*(1+i)N次方\t\n");
 71         printf("单利计算公式\t\n");
 72         printf("I=P*i*N次方\t\n");
 73         printf("本金计算公式\t\n");
 74         printf("P=F*(1+i)N次方\t\n");
 75         printf("时间计算公式\t\n");
 76         printf("T=(int)(log(F/P)/log(1+i/m)/m)\t\n");
 77         printf("利率计算公式\t\n");
 78         printf("R=m*(pow(F/P,1.0(N*m))-1)\t\n");
 79 
 80         printf("F:最后值:\t\n");
 81         printf("P:本金:\t\n");
 82         printf("R:利率:\t\n");
 83         printf("T:时间:\t\n");
 84     }
 85     
 86     
 87 void fuli() //复利
 88     {
 89      int T,m;
 90      double R,F,P;
 91      jisuan();
 92      printf("存入本金:");
 93      scanf("%lf",&P);
 94      printf("年利率:");
 95      scanf("%lf",&R);
 96      printf("存入年限:");
 97      scanf("%d",&T);
 98      printf("年复利次数:");
 99      scanf("%d",&m);
100      F=P*pow((1+T/m),T*m);
101      printf("最后值:%.4lf\n",F);
102     }
103    
104 
105 void danli() //单利
106     {
107     int T;
108     double R,F,P;
109     jisuan();
110     printf("存入本金:");
111     scanf("%lf",&P);
112     printf("年利率:");
113     scanf("%lf",&R);
114     printf("存入年限:");
115     scanf("%d",&T);
116     F=P*R*T;
117     printf("最后值:%.4lf\n",F);
118     }
119 
120 
121 
122 
123  void capital() //本金
124     {
125     int T,m;
126     double R,F,P;
127     jisuan();
128     printf("终值:");
129     scanf("%lf",&F);
130     printf("年利率:");
131     scanf("%lf",&R);
132     printf("存入年限:");
133     scanf("%d",&T);
134     printf("年复利次数:");
135     scanf("%d",&m);
136     P=F/pow((1+R/m),R*m);
137     printf("本金:%.4lf\n",P);
138     }
139 
140 
141 
142 void time() //时间
143    {
144    int T,m;
145    double R,F,P;
146    jisuan();
147    printf("存入本金:");
148    scanf("%lf",&P);
149    printf("年利率:");
150    scanf("%lf",&R);
151    printf("年复利次数:");
152    scanf("%d",&m);
153    printf("终值:");
154    scanf("%lf",&F);
155    T=(int)(log(F/P)/log(1+R/m)/m);
156    printf("时间:%d\n",T);
157    }
158 
159 
160 void rate() //利率
161    {
162    int T,m;
163    double R,F,P;
164    jisuan();
165    printf("存入本金:");
166    scanf("%lf",&P);
167    printf("存入年限:");
168    scanf("%d",&T);
169    printf("年复利次数:");
170    scanf("%d",&m);
171    printf("最后值:");
172    scanf("%lf",&F);
173    R=m*(pow(F/P,1.0/(T*m))-1);
174    printf("利率:%.4lf\n",R);
175    }