21 lines
484 B
C
21 lines
484 B
C
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/*
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*Student: S.K Soekhlal
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* Number: 4860632
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* Assignment: 1.4
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*/
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#include<stdio.h>
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#include<stdlib.h>
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#include<math.h>
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int main(){
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double a,r,b=0,sum=0; /*Declaring variables*/
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int N;
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scanf("%lf%d%lf",&a,&N,&r); /*Storing inputted values in variables*/
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for(;N>=0;--N){ /*Starting for loop to calculate sum*/
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b = a * (pow(r,N)); /*calculating sum*/
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sum += b;
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}
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printf("%.2f\n", sum); /*Printing sum on the screen*/
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return 0;
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}
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