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71 lines
2.7 KiB
C
71 lines
2.7 KiB
C
#include<stdio.h>
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#include<math.h>
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#define PI 3.14159265
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int n;
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int main(int argc, char **argv)
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{
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double realOut[n][n];
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double imagOut[n][n];
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double amplitudeOut[n][n];
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int height = n;
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int width = n;
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int yWave;
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int xWave;
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int ySpace;
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int xSpace;
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int i, j;
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double inputData[n][n];
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printf("Enter the size: ");
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scanf("%d", &n);
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printf("Enter the 2D elements ");
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for (i = 0; i < n; i++)
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for (j = 0; j < n; j++)
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scanf("%lf", &inputData[i][j]);
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// Two outer loops iterate on output data.
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for (yWave = 0; yWave < height; yWave++)
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{
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for (xWave = 0; xWave < width; xWave++)
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{
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// Two inner loops iterate on input data.
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for (ySpace = 0; ySpace < height; ySpace++)
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{
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for (xSpace = 0; xSpace < width; xSpace++)
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{
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// Compute real, imag, and ampltude.
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realOut[yWave][xWave] += (inputData[ySpace][xSpace] * cos(
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2 * PI * ((1.0 * xWave * xSpace / width) + (1.0
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* yWave * ySpace / height)))) / sqrt(
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width * height);
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imagOut[yWave][xWave] -= (inputData[ySpace][xSpace] * sin(
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2 * PI * ((1.0 * xWave * xSpace / width) + (1.0
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* yWave * ySpace / height)))) / sqrt(
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width * height);
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amplitudeOut[yWave][xWave] = sqrt(
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realOut[yWave][xWave] * realOut[yWave][xWave]
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+ imagOut[yWave][xWave]
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* imagOut[yWave][xWave]);
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}
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printf(" %e + %e i (%e)\n", realOut[yWave][xWave],
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imagOut[yWave][xWave], amplitudeOut[yWave][xWave]);
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}
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}
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}
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return 0;
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}
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/*
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Enter the size:
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2
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Enter the 2D elements
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2 3
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4 2
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2.5 + 0.0 i
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5.5 + 0.0 i
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-0.5 + -1.8369701987210297E-16 i
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0.5 + -3.0616169978683826E-16 i
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2.5 + 0.0 i
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-0.5 + -3.6739403974420594E-16 i
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-0.5 + -1.8369701987210297E-16 i
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-1.5 + -1.8369701987210297E-16 i
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