ГОСУДАРСТВЕННЫЙ КОМИТЕТ РОССИЙСКОЙ ФЕДЕРАЦИИ
ПО ВЫСШЕМУ И СРЕДНЕСПЕЦИАЛЬНОМУ ОБРАЗОВАНИЮ
КРАСНОЯРСКИЙ ГОСУДАРСТВЕННЫЙ ТЕХНИЧЕСКИЙ УНИВЕРСИТЕТ
Практическое задание
по компьютерной алгебре
тема: метод Гаусса с выбором главной переменной
Выполнил:
студент 2 курса ФИВТ
группы 27-4
Попов А.В.
Проверила:
Быкова Е.Г.
1998 г.
Текст программы.
#include
#include #include #include const num = 4; int i,j,I,J; int c[num+1]; long double x[num+1]; long double max; long double A[num][num+1]; // —————————————————————— void max_el(int sr, int st) { max = A[num+1-sr][num+2-st]; I = num+1-sr; J = num+2-st; for (i = num+1-sr ; i fabs(max)) { max = A[i][j]; I = i; J = j; } } } cout =1; i–) { temp = A[i][num+1]; for???????????????????????????????????????????????????????????????????? cout > ch; ch = ‘q’; for (j = 1 ; j> A[i][j]; } } // —————————————————————— void main() { clrscr(); load_file(); int g; for(g = num+1; g >= 3; g–) { interface(); max_el(g-1,g); getch(); perestanovka(g-1,g); interface(); getch(); preob(num+2-g); interface(); getch(); } clrscr(); print(num,num+1); otvet(); print(num,num+1); cout a b Ответы:
0 0 X1 = -12.660899
X2 = -16.107649
X3 = 5.273899
X4 = 66.299137
1 X1 = -12.132586
X2 = -14.858407
X3 = 5.186943
X4 = 63.347289
2 X1 = -11.604272
X2 = -13.609166
X3 = 5.099988
X4 = 60.39544
3 X1 = -11.075957
X2 = -12.359925
X3 = 5.013031
X4 = 57.443595
4 X1 = -10.547642
X2 = -11.110685
X3 = 4.926076
X4 = 54.491746
5 X1 = -10.019327
X2 = -9.861445
X3 = 4.839121
X4 = 51.539901
1 0 X1 = 13.959632
X2 = -39.106359
X3 = 7.324007
X4 = -27.756765
1 X1 = 16.668562
X2 = -46.672114
X3 = 8.73446
X4 = -33.605312
2 X1 = 19.377489
X2 = -54.237864
X3 = 10.144913
X4 = -39.453861
3 X1 = 22.086416
X2 = -61.803618
X3 = 11.555367
X4 = -45.30241
4 X1 = 24.795347
X2 = -69.369373
X3 = 12.96582
X4 = -51.150959
5 X1 = 27.504276
X2 = -76.935127
X3 = 14.376274
X4 = -56.999508
2 0 X1 = 1.033843
X2 = -1.696273
X3 = 0.997951
X4 = -0.211727
1 X1 = 1.191176
X2 = -2.016845
X3 = 1.183171
X4 = -0.486773
2 X1 = 1.348508
X2 = -2.337417
X3 = 1.36839
X4 = -0.761819
3 X1 = 1.505841
X2 = -2.657989
X3 = 1.55361
X4 = -1.036865
4 X1 = 1.663174
X2 = -2.978561
X3 = 1.73883
X4 = -1.311911
5 X1 = 1.820507
X2 = -3.299134
X3 = 1.92405
X4 = -1.586957
3 0 X1 = 0.772977
X2 = -0.794749
X3 = 0.762146
X4 = 0.13016
1 X1 = 0.872765
X2 = -0.954303
X3 = 0.902687
X4 = -0.008559
2 X1 = 0.972553
X2 = -1.113856
X3 = 1.043229
X4 = -0.147278
3 X1 = 1.072341
X2 = -1.27341
X3 = 1.18377
X4 = -0.285998
4 X1 = 1.172129
X2 = -1.432964
X3 = 1.324311
X4 = -0.424717
5 X1 = 1.271917
X2 = -1.592518
X3 = 1.464853
X4 = -0.563436
4 0 X1 = 0.675128
X2 = -0.476895
X3 = 0.645225
X4 = 0.196021
1 X1 = 0.754634
X2 = -0.580642
X3 = 0.763131
X4 = 0.105936
2 X1 = 0.83414
X2 = -0.68439
X3 = 0.881037
X4 = 0.015852
3 X1 = 0.913647
X2 = -0.788137
X3 = 0.998942
X4 = -0.074233
4 X1 = 0.993153
X2 = -0.891884
X3 = 1.116848
X4 = -0.164317
5 X1 = 1.072659
X2 = -0.995631
X3 = 1.234754
X4 = -0.254402
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