74 lines
1.1 KiB
Plaintext
74 lines
1.1 KiB
Plaintext
//#include "sylib.h"
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int n = 1400;
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int A[1400][1400];
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int b[1400];
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int x[1400];
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int y[1400];
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void kernel_ludcmp(int n,int A[][1400],int b[],int x[],int y[])
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{
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int i, j, k, w;
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i = 0;
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while (i < n) {
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j = 0;
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while (j < i) {
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w = A[i][j];
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k = 0;
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while (k < j) {
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w = w - A[i][k] * A[k][j];
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k = k +1;
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}
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A[i][j] = w / A[j][j];
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j = j +1;
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}
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j = i;
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while (j < n) {
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w = A[i][j];
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k = 0;
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while (k < i) {
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w = w - A[i][k] * A[k][j];
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k = k +1;
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}
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A[i][j] = w;
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j = j +1;
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}
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i = i +1;
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}
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i = 0;
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while (i < n) {
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w = b[i];
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j = 0;
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while (j < i) {
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w = w - A[i][j] * y[j];
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j = j +1;
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}
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y[i] = w;
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i = i +1;
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}
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i = n -1;
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while (i >=0) {
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w = y[i];
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j = i + 1;
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while (j < n) {
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w = w - A[i][j] * x[j];
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j = j+1;
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}
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x[i] = w / A[i][i];
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i = i -1;
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}
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}
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int main()
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{
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getarray(A);
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getarray(b);
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getarray(x);
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getarray(y);
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starttime();
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kernel_ludcmp (n, A, b, x, y);
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stoptime();
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putarray(n, x);
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return 0;
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} |