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solve linear equation system equation functions in c/c++
#include "stdafx.h"
int matrixToValues(char matrix[DIM], double result) {
int i = 0, j = 0, k = 0, l = 0;
for (i = 0; matrix[i] != '\0'; i++) {
if (matrix[i] == ';') {
count++;
}
}
for (i = 0; i < count - 1; i++) {
for (j = 0; j < count; j++) {
char value[DIM] = ""; char valueF[DIM] = "";
values[i][j] = 0;
valuesI[i][j] = 0;
l = 0;
while (matrix[k] != '\0'&&matrix[k] != ';'&&matrix[k] != '\\') {
value[l] = matrix[k];
k++; l++;
}
value[l] = '\0';
k++;
calcNow(value, result, 0);
if (verified == 1) {
values[i][j] = resultR;
valuesS[i][j] = values[i][j];
valuesI[i][j] = resultI;
valuesSI[i][j] = valuesI[i][j];
}
else {
return 0;
}
}
}
return 1;
}
void solveSystem() {
int i = 0, j = 0, jC = 0, iC = 0, iS = 0, jS = 0, g = 0, countVal = 0;
double divider = 0, dividerI = 0, valuesToiC[DIM], dividedi[DIM], real = 0, imag = 0;
while (i < count - 1) {
valuesToiC[i] = 100;
i++;
}
while (jC < count - 1 || countVal != 1 && jC != count - 1) {
while (i < count - 1) {
dividedi[i] = 100;
i++;
}
j = jC;
for (i = iC; i < count - 1; i++) {
j = jC;
if ((values[i][j] != 0 || valuesI[i][j] != 0) && valuesToiC[i] != 200) {
divider = values[i][j];
dividerI = valuesI[i][j];
dividedi[i] = 200;
for (j = 0; j < count; j++) {
division(values[i][j], valuesI[i][j], divider, dividerI);
values[i][j] = resultR;
valuesI[i][j] = resultI;
}
countVal = 0;
for (g = 0; g < count - 1; g++) {
if (values[i][g] != 0 || valuesI[i][g] != 0) {
countVal++;
}
}
}
}
if (countVal != 1) {
i = 0;
while (i < count - 1) {
if (values[i][jC] == 1 && valuesI[i][jC] == 0 && i == jC) {
iC = i;
valuesToiC[iC] = 200;
break;
}
i++;
}
for (i = (iC + 1) % (count - 1); i < count - 1; i++) {
if (values[i][jC] != 0 || valuesI[i][jC] != 0) {
for (j = 0; j < count; j++) {
if (valuesToiC[i] != 200 && dividedi[i] == 200 && dividedi[iC] == 200) {
subtraction(values[i][j], valuesI[i][j], values[iC][j], valuesI[iC][j]);
values[i][j] = resultR;
valuesI[i][j] = resultI;
}
}
}
}
for (i = 0; i < count - 1; i++) {
if (values[i][jC] == 0 && valuesI[i][jC] == 0) {
iC = i;
break;
}
}
}
jC++;
}
}
void rearrangeValues() {
int i = 0, j = 0, weight[DIM];
for (i = 0; i < count - 1; i++) {
for (j = 0; j < count - 1; j++) {
valInd[i][j] = 0;
}
}
for (i = 0; i < count - 1; i++) {
for (j = 0; j < count - 1; j++) {
if (values[i][j] != 0 || valuesI[i][j] != 0) {
valInd[i][j] = j;
}
else {
valInd[i][j] = -1;
}
}
}
for (i = 0; i < count - 1; i++) {
weight[i] = 0;
for (j = 0; j < count - 1; j++) {
weight[i] = (int)(weight[i] + valInd[i][j]);
}
}
double valSave = 0;
int arrangeOrder[DIM], equa[DIM];
for (i = 0; i < count - 1; i++) {
arrangeOrder[i] = -1;
equa[i] = 1;
}
int index = 0;
int wei = 5000;
for (i = 0; i < count - 1; i++) {
wei = 5000;
index = 0;
for (j = 0; j < count - 1; j++) {
if (valInd[j][i] == i && arrangeOrder[i] == -1 && equa[j] == 1) {
if (wei > weight[j]) {
wei = weight[j];
index = j;
}
}
}
arrangeOrder[i] = index;
equa[index] = 0;
}
for (i = 0; i < count - 1; i++) {
for (j = 0; j < count; j++) {
valuesF[i][j] = values[arrangeOrder[i]][j];
valuesFI[i][j] = valuesI[arrangeOrder[i]][j];
}
}
for (i = 0; i < count - 1; i++) {
for (j = 0; j < count; j++) {
values[i][j] = valuesF[i][j];
valuesI[i][j] = valuesFI[i][j];
}
}
}
void getSolutions() {
int j = 0, i = 0, jS = 0, iS = 0;
j = count - 1;
i = count - 2;
jS = j;
iS = i;
i--;
while (j - 1 >= 1) {
while (i >= 0) {
resultR = 0; resultI = 0;
multiplication(values[i][j - 1], valuesI[i][j - 1], values[iS][jS], valuesI[iS][jS]);
subtraction(values[i][count - 1], valuesI[i][count - 1], resultR, resultI);
values[i][count - 1] = resultR;
valuesI[i][count - 1] = resultI;
values[i][j - 1] = 0; valuesI[i][j - 1] = 0;
i--;
}
j--;
iS--;
i = iS - 1;
}
}
Source: sourceforge.net
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