Lis (linear Algebra Library) - Example

Example

A C program to solve the linear equation Ax=b is written as follows:

#include #include "lis_config.h" #include "lis.h" LIS_INT main(LIS_INT argc, char* argv) { LIS_MATRIX A; LIS_VECTOR b,x; LIS_SOLVER solver; LIS_INT iter; double times; lis_initialize(&argc, &argv); lis_matrix_create(LIS_COMM_WORLD,&A); lis_vector_create(LIS_COMM_WORLD,&b); lis_vector_create(LIS_COMM_WORLD,&x); lis_solver_create(&solver); lis_solver_set_optionC(solver); lis_input(A,b,x,argv); lis_vector_set_all(1.0,b); lis_vector_duplicate(A,&x); lis_solve(A,b,x,solver); lis_solver_get_iters(solver,&iter); lis_solver_get_time(solver,&times); printf("iter= %d time = %e\n",iter,times); lis_solver_destroy(solver); lis_matrix_destroy(A); lis_vector_destroy(b); lis_vector_destroy(x); lis_finalize; return 0; }

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