Untitled

#include <stdio.h>

int main(void){
        float sum;
        int x; // interest accrued for the year
        const float i = 0.8; // interest rate
        int year;

        for ( sum = 1000000, year = 0; sum > 0; year++)
        {
                sum -= 100000;
                x   *= sum * i;
                sum += x;
                printf("Year %d: $%lf",year,sum);
        }

        return 0;
}