tune_c.c

/* Copyright 2021, 狗万app足彩Gurobi Optimization, LLC */ /*这个例子从一个文件中读取一个模型并调优它。然后，它将最佳参数设置写入文件，并使用这些参数解决模型。*/ #include  #include  #include  #include "gurobi_c.h" int main(int argc, char *argv[]) {GRBenv *env = NULL;GRBmodel *model = NULL;int tuneresultcount;Int error = 0;if (argc < 2) {fprintf(stderr， "Usage: tune_c filename\n");退出(1);} /*创建环境*/ error = GRBloadenv(&env， "tune_c.log");if (error) goto QUIT; /* Read model from file */ error = GRBreadmodel(env, argv[1], &model); if (error) goto QUIT; /* Set the TuneResults parameter to 1 */ error = GRBsetintparam(GRBgetenv(model), GRB_INT_PAR_TUNERESULTS, 1); if (error) goto QUIT; /* Tune the model */ error = GRBtunemodel(model); if (error) goto QUIT; /* Get the number of tuning results */ error = GRBgetintattr(model, GRB_INT_ATTR_TUNE_RESULTCOUNT, &tuneresultcount); if (error) goto QUIT; if (tuneresultcount > 0) { /* Load the best tuned parameters into the model's environment */ error = GRBgettuneresult(model, 0); if (error) goto QUIT; /* Write tuned parameters to a file */ error = GRBwrite(model, "tune.prm"); if (error) goto QUIT; /* Solve the model using the tuned parameters */ error = GRBoptimize(model); if (error) goto QUIT; } QUIT: /* Error reporting */ if (error) { printf("ERROR: %s\n", GRBgeterrormsg(env)); exit(1); } /* Free model */ GRBfreemodel(model); /* Free environment */ GRBfreeenv(env); return 0; }