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December 14, 2015 13:39
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Me, playing around with SQLite3.
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#include "sqlite3.h" | |
#include <iostream> | |
#include <cstring> | |
using namespace std; | |
int charcount(char* str, const char c) { | |
int count = 0; | |
while(*str) { | |
if (*str == c) { | |
count++; | |
} | |
str++; | |
} | |
return count; | |
} | |
int execute(sqlite3* db, const char* command) { | |
sqlite3_stmt *stmt; | |
while(charcount((char*)command, ';') > 0) { | |
sqlite3_prepare_v2(db, command, strlen(command), &stmt, &command); | |
switch(sqlite3_step(stmt)) { | |
case SQLITE_DONE: | |
break; | |
case SQLITE_ROW: | |
//output the row's data | |
for (int i = 0; i < sqlite3_column_count(stmt); i++) { | |
switch(sqlite3_column_type(stmt, i)) { | |
case SQLITE_INTEGER: | |
cout << sqlite3_column_int(stmt, i); | |
break; | |
case SQLITE_FLOAT: | |
cout << sqlite3_column_double(stmt, i); | |
break; | |
case SQLITE_TEXT: | |
cout << sqlite3_column_text(stmt, i); | |
break; | |
case SQLITE_BLOB: | |
cout << "[blob]"; | |
break; | |
case SQLITE_NULL: | |
cout << "[null]"; | |
break; | |
} | |
} | |
break; | |
case SQLITE_ERROR: | |
sqlite3_finalize(stmt); | |
return 1; | |
default: | |
sqlite3_finalize(stmt); | |
return 1; | |
} | |
sqlite3_reset(stmt); | |
} | |
sqlite3_finalize(stmt); | |
return 0; | |
} | |
int main(int argc, char* argv[]) { | |
sqlite3 *db; | |
if (sqlite3_open("file.db", &db) != SQLITE_OK) { | |
cerr << "Failed to open the database" << endl; | |
sqlite3_close(db); | |
return 1; | |
} | |
const char *command = "\ | |
CREATE TABLE IF NOT EXISTS user ('name' TEXT,'age' NUMERIC,'cats' NUMERIC,'programmer' TEXT);\ | |
INSERT INTO user VALUES('Kayne', 21, 5, 'true');\ | |
INSERT INTO user VALUES('Chris', 22, 1, 'true');\ | |
INSERT INTO user VALUES('Logan', 21, 0, 'true');\ | |
INSERT INTO user VALUES('Jordan', 17, 5, 'false');\ | |
"; | |
execute(db, command); | |
command = "SELECT * FROM user"; | |
execute(db, command); | |
sqlite3_close(db); | |
return 0; | |
} |
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