#include <stdio.h>
#include <math.h>
void flow_rate(double D, double L, double k, double H);
int main()
{
double D,L,k,H;
k=0.1;
D=10.0;
L=200.0;
H=50.0;
flow_rate(D,L,k,H);
return 0;
}
void flow_rate(double D, double L, double k, double H)
{
double Q,i,A;
i=H/L;
A=atan(1.0)*4*D*D/4;
Q=k*i*A;
printf("i= %lf\n",i);
printf("A= %lf\n",A);
printf("Flow rate = %lf\n",Q);
}
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