1/*
2REM
3REM u06.pc
4REM
5REM Accounts with balances over $10,000 receive 6 percent interest,
6REM while all others receive 5 percent.
7REM
8*/
9
10#include <stdio.h>
11#include <sqlca.h>
12
13#define UNAME_LEN 32
14#define PWD_LEN 16
15
16VARCHAR username[UNAME_LEN]; /* VARCHAR is an Oracle-supplied struct */
17VARCHAR password[PWD_LEN]; /* varchar can be in lower case also. */
18
19char u_name[UNAME_LEN];
20char pwd[PWD_LEN];
21
22struct {
23 char branchname[16];
24 int accountnumber;
25 char customername[16];
26 int balance;
27} depositor;
28
29void connect_to_oracle();
30void sql_error();
31
32void main(int argc, char* argv[]) {
33 connect_to_oracle();
34
35 EXEC SQL
36 UPDATE Depositor
37 SET balance = balance*1.06
38 WHERE balance>10000;
39
40 EXEC SQL
41 UPDATE Depositor
42 SET balance = balance*1.05
43 WHERE balance<=10000;
44
45 EXEC SQL DECLARE c CURSOR FOR
46 SELECT *
47 FROM Depositor;
48
49 EXEC SQL OPEN c;
50
51 EXEC SQL WHENEVER NOT FOUND DO BREAK;
52
53 printf("\nbranchname\taccountnumber\tcustomername\tbalance\n");
54 for(;;) {
55 EXEC SQL FETCH c INTO :depositor;
56 printf("%s\t%d\t\t%s\t%d\n", depositor.branchname,
57 depositor.accountnumber,
58 depositor.customername,
59 depositor.balance);
60 }
61
62 EXEC SQL CLOSE c;
63
64 EXEC SQL COMMIT WORK RELEASE;
65
66 exit(0);
67}
68
69
70void sql_error(char* msg) {
71 char err_msg[128];
72 int buflen, msglen;
73
74 EXEC SQL WHENEVER SQLERROR CONTINUE;
75
76 printf("%s \n", msg);
77 buflen = sizeof(err_msg);
78 sqlglm(err_msg, &buflen, &msglen);
79 printf("%.*s \n", msglen, err_msg);
80 exit(1);
81}
82
83
84void connect_to_oracle() {
85 /* get your username/passwd from "user_pwd.txt" file */
86
87 FILE *in_file;
88 in_file = fopen("user_pwd.txt", "r");
89 fscanf(in_file, "%s", u_name);
90 fscanf(in_file, "%s", pwd);
91
92 strncpy((char *) username.arr, u_name, UNAME_LEN);
93 username.len = strlen((char *) username.arr);
94
95 strncpy((char *) password.arr, pwd, PWD_LEN);
96 password.len = strlen((char *) password.arr);
97
98 EXEC SQL WHENEVER SQLERROR DO sql_error ("ORACLE error-- ");
99 EXEC SQL CONNECT :username IDENTIFIED BY :password;
100
101 printf("connected to oracle - \n");
102}