C 程序编写--计算存款利息

收益=本金+利息

单位时间利息 =本金*利息率
收益P ,本金P1,利息率x%,时间（通常为年数）n 
公式  P=P1（1+x%）^n

#include <stdio.h>
#include <stdlib.h>
#include <math.h>
 main()
{
    float capital , income ;
    int year;
    printf("please input capital and year:");
    scanf("%f%d",&capital,&year);
    switch(year)
    {
        case 1: income = capital*pow((1 + 0.0225),year);
                break;
        case 2: income = capital*pow((1 + 0.0243),year);
                break;
         case 3: income = capital*pow((1 + 0.0270),year);
                break;
         case 4: income = capital*pow((1 + 0.0288),year);
                break;
         case 5: income = capital*pow((1 + 0.0300),year);
                break;
        default: printf("the year is error!");
                break;

    }
    printf("the all income is %f\n",income);
}