Language
C++
Compiler
gcc HEAD 9.0.0 20180723 (experimental)
Options
Warnings
Boost 1.67.0
C++2a(GNU)
no pedantic
$ g++ prog.cc -Wall -Wextra -I/opt/wandbox/boost-1.67.0/gcc-head/include -std=gnu++2a +1.000000x1 -2.000000x2 +3.000000x3 -4.000000x4 = +5.000000
-2.000000x1 +5.000000x2 +8.000000x3 -3.000000x4 = +9.000000
+5.000000x1 +4.000000x2 +7.000000x3 +1.000000x4 = -1.000000
+9.000000x1 +7.000000x2 +3.000000x3 +5.000000x4 = +4.000000
前進消去
+1.000000x1 -2.000000x2 +3.000000x3 -4.000000x4 = +5.000000
+0.000000x1 +1.000000x2 +14.000000x3 -11.000000x4 = +19.000000
+0.000000x1 +0.000000x2 -204.000000x3 +175.000000x4 = -292.000000
+0.000000x1 +0.000000x2 +0.000000x3 -4.833333x4 = +19.333333
後退代入
+1.000000x1 +0.000000x2 +0.000000x3 +0.000000x4 = +1.000000
+0.000000x1 +1.000000x2 +0.000000x3 +0.000000x4 = +3.000000
+0.000000x1 +0.000000x2 +1.000000x3 +0.000000x4 = -2.000000
+0.000000x1 +0.000000x2 +0.000000x3 +1.000000x4 = -4.000000
x1 = 1.000000
x2 = 3.000000
x3 = -2.000000
x4 = -4.000000
Exit Code:
0