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52 lines
1.8 KiB
52 lines
1.8 KiB
/* sample.c */
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#include <stdio.h>
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#include <stdlib.h>
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#include <glpk.h>
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int main(void)
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{ glp_prob *lp;
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int ia[1+1000], ja[1+1000];
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double ar[1+1000], z, x1, x2, x3;
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s1: lp = glp_create_prob();
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s2: glp_set_prob_name(lp, "sample");
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s3: glp_set_obj_dir(lp, GLP_MAX);
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s4: glp_add_rows(lp, 3);
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s5: glp_set_row_name(lp, 1, "p");
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s6: glp_set_row_bnds(lp, 1, GLP_UP, 0.0, 100.0);
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s7: glp_set_row_name(lp, 2, "q");
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s8: glp_set_row_bnds(lp, 2, GLP_UP, 0.0, 600.0);
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s9: glp_set_row_name(lp, 3, "r");
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s10: glp_set_row_bnds(lp, 3, GLP_UP, 0.0, 300.0);
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s11: glp_add_cols(lp, 3);
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s12: glp_set_col_name(lp, 1, "x1");
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s13: glp_set_col_bnds(lp, 1, GLP_LO, 0.0, 0.0);
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s14: glp_set_obj_coef(lp, 1, 10.0);
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s15: glp_set_col_name(lp, 2, "x2");
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s16: glp_set_col_bnds(lp, 2, GLP_LO, 0.0, 0.0);
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s17: glp_set_obj_coef(lp, 2, 6.0);
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s18: glp_set_col_name(lp, 3, "x3");
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s19: glp_set_col_bnds(lp, 3, GLP_LO, 0.0, 0.0);
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s20: glp_set_obj_coef(lp, 3, 4.0);
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s21: ia[1] = 1, ja[1] = 1, ar[1] = 1.0; /* a[1,1] = 1 */
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s22: ia[2] = 1, ja[2] = 2, ar[2] = 1.0; /* a[1,2] = 1 */
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s23: ia[3] = 1, ja[3] = 3, ar[3] = 1.0; /* a[1,3] = 1 */
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s24: ia[4] = 2, ja[4] = 1, ar[4] = 10.0; /* a[2,1] = 10 */
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s25: ia[5] = 3, ja[5] = 1, ar[5] = 2.0; /* a[3,1] = 2 */
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s26: ia[6] = 2, ja[6] = 2, ar[6] = 4.0; /* a[2,2] = 4 */
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s27: ia[7] = 3, ja[7] = 2, ar[7] = 2.0; /* a[3,2] = 2 */
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s28: ia[8] = 2, ja[8] = 3, ar[8] = 5.0; /* a[2,3] = 5 */
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s29: ia[9] = 3, ja[9] = 3, ar[9] = 6.0; /* a[3,3] = 6 */
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s30: glp_load_matrix(lp, 9, ia, ja, ar);
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s31: glp_simplex(lp, NULL);
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s32: z = glp_get_obj_val(lp);
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s33: x1 = glp_get_col_prim(lp, 1);
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s34: x2 = glp_get_col_prim(lp, 2);
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s35: x3 = glp_get_col_prim(lp, 3);
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s36: printf("\nz = %g; x1 = %g; x2 = %g; x3 = %g\n",
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z, x1, x2, x3);
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s37: glp_delete_prob(lp);
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return 0;
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}
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/* eof */
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