Language: C

main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}

Compiler output:
main.c:1:1: error: return type defaults to 'int' [-Wimplicit-int]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      | ^~~~
main.c: In function 'main':
main.c:1:53: error: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                     ^~~~~
main.c:1:1: note: include '<stdio.h>' or provide a declaration of 'scanf'
  +++ |+#include <stdio.h>
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
main.c:1:53: warning: incompatible implicit declaration of built-in function 'scanf' [-Wbuiltin-declaration-mismatch]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                     ^~~~~
main.c:1:53: note: include '<stdio.h>' or provide a declaration of 'scanf'
main.c:1:208: error: lvalue required as left operand of assignment
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                                                                                                                                                                                ^
main.c:1:215: error: lvalue required as left operand of assignment
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                                                                                                                                                                                       ^
main.c:1:218: error: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                                                                                                                                                                                          ^~~~~~
main.c:1:218: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:218: warning: incompatible implicit declaration of built-in function 'printf' [-Wbuiltin-declaration-mismatch]
main.c:1:218: note: include '<stdio.h>' or provide a declaration of 'printf'
main.c:1:247: error: implicit declaration of function 'exit' [-Wimplicit-function-declaration]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                                                                                                                                                                                                                       ^~~~
main.c:1:1: note: include '<stdlib.h>' or provide a declaration of 'exit'
  +++ |+#include <stdlib.h>
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
main.c:1:247: warning: incompatible implicit declaration of built-in function 'exit' [-Wbuiltin-declaration-mismatch]
    1 | main(){double a,b,c,d,e,f,g,h,i,j,k,l,x,y,t,u;while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=-1){j=g=a*d;k=e*a;h=d*b;i=c*d;l=f*a;t=h-k;u=i-l;y=u/t;h=k=b*e;g=e*a;i=c*e;j=d*b;l=f*b;t=g-j;u=i-l;x=u/t;x||x=0;y||y=0;printf("%.3lf %.3lf\n",x,y);}exit(0);}
      |                                                                                                                                                                                                                                                       ^~~~
main.c:1:247: note: include '<stdlib.h>' or provide a declaration of 'exit'