078.怎样存钱以获取最大利息

#include<stdio.h>
#include<math.h>
void main()
{
    int i8,i5,i3,i2,i1,n8,n5,n3,n2,n1;
    float max=0,term;
    clrscr();
    for(i8=0;i8<3;i8++)       /*穷举所有可能的存款方式*/
        for(i5=0;i5<=(20-8*i8)/5;i5++)
            for(i3=0;i3<=(20-8*i8-5*i5)/3;i3++)
                for(i2=0;i2<=(20-8*i8-5*i5-3*i3)/2;i2++)
                {
                    i1=20-8*i8-5*i5-3*i3-2*i2;
                    term=2000.0*pow((double)(1+0.0063*12),(double)i1)
                               *pow((double)(1+2*0.0063*12),(double)i2)
                               *pow((double)(1+3*0.0069*12),(double)i3)
                               *pow((double)(1+5*0.0075*12),(double)i5)
                               *pow((double)(1+8*0.0084*12),(double)i8);
                                            /*计算到期时的本利合计*/
                     if(term>max)
                     {
                          max=term;n1=i1;n2=i2;n3=i3;n5=i5;n8=i8;
                     }
                }
    printf("For maxinum profit,he should so save his money in a bank:\n");
    printf("   made fixed deposit for 8 year: %d times\n",n8);
    printf("   made fixed deposit for 5 year: %d times\n",n5);
    printf("   made fixed deposit for 3 year: %d times\n",n3);
    printf("   made fixed deposit for 2 year: %d times\n",n2);
    printf("   made fixed deposit for 1 year: %d times\n",n1);
    printf("                            Toal: %.2f\n",max);
            /*输出存款方式*/
    puts("\n Press any key to quit...");
    getch();
}