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/* procedure completed unsuccessfully */ else OUTPUT(N, X2, K,
TOL); } return 0;}
void INPUT(int *OK, double *X1, double A[][11], double *TOL, int
*N, int *NN){ int I, J; char AA; char NAME[30]; FILE *INP;
printf("This is the Jacobi Method for Linear Systems.\n"); *OK =
false; printf("The array will be input from a text file in the
order:\n"); printf("A(1,1), A(1,2), ..., A(1,n+1), A(2,1), A(2,2),
..., A(2,n+1),\n"); printf("..., A(n,1), A(n,2), ...,
A(n,n+1)\n\n"); printf("Place as many entries as desired on each
line, but separate ");
printf("entries with\n"); printf("at least one blank.\n");
printf("The initial approximation should follow in same
format.\n\n\n"); printf("Has the input file been created? - enter Y
or N.\n"); scanf("%c",&AA); if ((AA == 'Y') || (AA == 'y')) {
printf("Input the file name in the form - drive:name.ext\n");
printf("for example: A:DATA.DTA\n"); scanf("%s", NAME); INP =
fopen(NAME, "r"); *OK = false; while (!(*OK)) { printf("Input the
number of equations - an integer.\n"); scanf("%d", N); if (*N >
0) { for (I=1; I
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else printf("The program will end so the input file can be
created.\n");}
void OUTPUT(int N, double *X2, int K, double TOL){ int I, J,
FLAG; char NAME[30]; FILE *OUP;
printf("Choice of output method:\n"); printf("1. Output to
screen\n"); printf("2. Output to text file\n"); printf("Please
enter 1 or 2.\n"); scanf("%d", &FLAG); if (FLAG == 2) {
printf("Input the file name in the form - drive:name.ext\n");
printf("for example: A:OUTPUT.DTA\n"); scanf("%s", NAME);
OUP = fopen(NAME, "w"); } else OUP = stdout; fprintf(OUP,
"JACOBI ITERATIVE METHOD FOR LINEAR SYSTEMS\n\n"); fprintf(OUP,
"The solution vector is :\n"); for (I=1; I= 0) return val; else
return -val;}
