c語言解三元壹次方程組！接著我的代碼寫！盡快~

float d=a[0,0]*a[1,1]*a[2,2]+a[0,1]*a[1,2]*a[2,0]+a[0,2]*a[1,0]*a[2,1]-a[0,0]*a[1,2]*a[2,1]-a[0,1]*a[1,0]*a[2,2]-a[0,2]*a[1,1]*a[2,0];

if(d==0)printf("無解\n");

else{

float p=a[0,3]*a[1,1]*a[2,2]+a[0,1]*a[1,2]*a[2,3]+a[0,2]*a[1,3]*a[2,1]-a[0,3]*a[1,2]*a[2,1]-a[0,1]*a[1,3]*a[2,2]-a[0,2]*a[1,1]*a[2,3];

float q=a[0,0]*a[1,3]*a[2,2]+a[0,3]*a[1,2]*a[2,0]+a[0,2]*a[1,0]*a[2,3]-a[0,0]*a[1,2]*a[2,3]-a[0,3]*a[1,0]*a[2,2]-a[0,2]*a[1,3]*a[2,0];

float r=a[0,0]*a[1,1]*a[2,3]+a[0,1]*a[1,3]*a[2,0]+a[0,3]*a[1,0]*a[2,1]-a[0,0]*a[1,3]*a[2,1]-a[0,1]*a[1,0]*a[2,3]-a[0,3]*a[1,1]*a[2,0];

printf("x1=%f\n",p/d);

printf("x2=%f\n",q/d);

printf("x3=%f\n",r/d);

}

}