Bode Plot
| Time Limit: 1000MS | Memory Limit: 10000K | |
| Total Submissions: 14060 | Accepted: 8820 |
Description
Consider the AC circuit below. We will assume that the circuit is in steady-state. Thus, the voltage at nodes 1 and 2 are given by v1 = VS coswt and v2 = VRcos (wt + q ) where VS is the voltage of the source, w is the frequency (in radians per second), and t is time. VR is the magnitude of the voltage drop across the resistor, and q is its phase.
You are to write a program to determine VR for different values of w. You will need two laws of electricity to solve this problem. The first is Ohm's Law, which states v2 = iR where i is the current in the circuit, oriented clockwise. The second is i = C d/dt (v1-v2) which relates the current to the voltage on either side of the capacitor. "d/dt"indicates the derivative with respect to t.
Input
The
input will consist of one or more lines. The first line contains three
real numbers and a non-negative integer. The real numbers are VS,
R, and C, in that order. The integer, n, is the number of test cases.
The following n lines of the input will have one real number per line.
Each of these numbers is the angular frequency, w.
input will consist of one or more lines. The first line contains three
real numbers and a non-negative integer. The real numbers are VS,
R, and C, in that order. The integer, n, is the number of test cases.
The following n lines of the input will have one real number per line.
Each of these numbers is the angular frequency, w.
Output
For each angular frequency in the input you are to output its corresponding VR on a single line. Each VR value output should be rounded to three digits after the decimal point.
Sample Input
1.0 1.0 1.0 9
0.01
0.031623
0.1
0.31623
1.0
3.1623
10.0
31.623
100.0
Sample Output
0.010
0.032
0.100
0.302
0.707
0.953
0.995
1.000
1.000
Source
分析：年轻态健康品——水
/*
1.0 1.0 1.0 9
0.01
0.031623
0.1
0.31623
1.0
3.1623
10.0
31.623
100.0
*/ #include <stdio.h>
#include <math.h> #define MAX_NUM 50 int n;
double Vs, R, C;
double w[MAX_NUM], Vr[MAX_NUM]; void GetData()
{
int i = ;
scanf("%lf %lf %lf %d", &Vs, &R, &C, &n);
for(i=; i<n; i++)
{
scanf("%lf", &w[i]);
}
} void Calc()
{
int i = ;
for(i=; i<n; i++)
{
Vr[i]=C*R*w[i]*Vs / sqrt( + pow(C*R*w[i], ));
}
} void PrintResult()
{
int i = ;
for(i=; i<n; i++)
{
printf("%.3f\n", Vr[i]);
}
} int main()
{
GetData();
Calc();
PrintResult();
return ;
}