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- #include<iostream>
- using namespace std;
- int main()
- {
- int n=3;
- float r[3][4]={
- {4,5,3,12},
- {20,27,18,65},
- {-8,-2,12,2}
- };
- float x[3];
- int i;
- int j;
- int c;
- int d;
- int k;
- for(i=0;i<n-1;i++){
- c=r[i][i];
- for(j=i+1;j<n;j++){
- d=r[j][i]/c;
- for(k=i;k<i+1;k++){
- r[j][k]=r[j][k]-(r[i][k]*d);
- }
- }
- }
- for(i=n; i<=n; i--){
- c=r[i][n+1];
- for(k=i+1; k<=n; k++){
- c=c-r[i][k]*x[k];
- }
- x[i]=c/r[i][i];
- }
- for(i=0;i<n;i++) cout<<x[i]<<'\t';
- cout<<endl;
- return 0;
- }
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