95 lines
1.8 KiB
C
95 lines
1.8 KiB
C
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/***********************************************************************\
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* *
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* RELATE1.C Copyright (C) 1993 Sequiter Software Inc. *
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* *
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\***********************************************************************/
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/* See User's Manual, page 131 */
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#include "d4all.h"
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#ifdef __TURBOC__
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extern unsigned _stklen = 10000;
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#endif
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CODE4 code_base;
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DATA4 *student = NULL,*enrollment = NULL;
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RELATE4 *master = NULL,*slave = NULL;
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TAG4 *id_tag,*name_tag;
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void open_data_files() ;
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void set_relation() ;
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void print_record() ;
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void open_data_files()
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{
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d4init(&code_base);
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student = d4open(&code_base,"STUDENT");
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enrollment = d4open(&code_base,"ENROLL");
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name_tag = d4tag(student,"NAME");
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id_tag = d4tag(enrollment,"STU_ID_TAG");
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e4exit_test(&code_base);
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}
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void set_relation()
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{
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master = relate4init(student);
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if(master == NULL) exit(1);
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slave = relate4create_slave(master,enrollment
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,"ID",id_tag);
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relate4type(slave,relate4scan);
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relate4top(master);
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}
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void print_record()
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{
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RELATE4 *relation;
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DATA4 *data;
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FIELD4 *field;
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int j;
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for(relation = master;relation != NULL
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;relate4next(&relation))
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{
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data = relation->data;
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for(j = 1;j <= d4num_fields(data);j++)
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printf("%s "
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,f4memo_str(d4field_j(data,j)));
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}
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printf("\n");
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}
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void list_records()
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{
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int rc;
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for(rc = relate4top(master);rc != r4eof;rc = relate4skip(master,1L))
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print_record();
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printf("\n");
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relate4unlock(master);
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}
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void main()
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{
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open_data_files();
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set_relation();
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list_records();
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relate4unlock(master);
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relate4free(master,0);
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d4close_all(&code_base);
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}
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