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- #include <iostream>
- #include<stdlib.h>
- #include<math.h>
- using namespace std;
- float Gauss(int n, float A[][4], float B[],float X[])
- {
- int i,k,j;
- float m,d;
- for(i=1;i<=n-1;i++)
- for(k=i+1;k<=n;k++)
- {
- m=A[k][i]/A[i][i];
- for(j=i;j<=n;j++)
- A[k][j]=A[k][j]-m*A[i][j];
- B[k]=B[k]-m*B[i];
- }
- d=1;
- if(A[n][n]==0)
- return 1;
- for(i=1;i<=n;i++)
- d=d*A[i][i];
- for(i=n;i>=1;i--)
- {
- X[i]=B[i];
- for(j=n;j>=i+1;j--)
- X[i]=X[i]-A[i][j]*X[j];
- X[i]=X[i]/A[i][i];
- }
- return d;
- }
- int main()
- {
- float A[4][4]={{0,0,0,0},{0,3,1,-0.7},{0,1,3,-0.5},{0,0.8,0.7,2}};
- float B[4]={0,1,3,2}, X[3];
- int n=3,i;
- cout<<"Determinantul sistemului este "<<Gauss(n,A,B,X)<<endl;
- for(i=1;i<=n;i++)
- cout<<X[i]<<endl;
- return 0;
- }
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