dots, commas etc get converted into a special symbol "?" in iphone - iphone

Question

i'm using a database to fetch datas. there are almost 750 questions in database.some questions contain special character's like ",....,' etc. but while fetch the data and print it in a textview it get converted into "?". is there any way to remove these kind of symbols and print it in original format.
I used the below code for fetching and displaying in textview.
qsql=[NSString stringWithFormat:#"Select * from mydata where col_1 = '365'"];
if(sqlite3_prepare_v2(database, [qsql UTF8String], -1, &statement, NULL) == SQLITE_OK) {
while (sqlite3_step(statement) == (SQLITE_ROW))
{
char *field0 = (char *)sqlite3_column_text(statement, 1);
char *field1 = (char *)sqlite3_column_text(statement, 2);
NSString *t1 = nil;
if(field0!=NULL){
t1 = [[NSString alloc] initWithUTF8String:field0];
//NSString *t1 = [[NSString alloc] initWithCString:field0 encoding:NSUTF8StringEncoding];
NSLog(#"%#jujuj" ,t1);
}
NSString *t2 = nil;
if(field1!=NULL){
t2 = [[NSString alloc] initWithUTF8String:field1];
NSLog(#"%#jhjhh" ,t2);
}
NSString *string=t1;
NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:#",."];
string = [[string componentsSeparatedByCharactersInSet:doNotWant] componentsJoinedByString:#""];
NSLog(#"%#jhgkjghkjg",string);
//NSLog(#"%# %#",Q_NO, Q_NO1);
tv.text=t1;
tv1.text=t2;
[t1 release];
[t2 release];
}
}

Answer 1

Use NSCharacterSet to remove that special Character from you string
NSString *string = #"ram,...";
NSCharacterSet *doNotWant = [NSCharacterSet characterSetWithCharactersInString:#",."];
string = [[string componentsSeparatedByCharactersInSet:doNotWant] componentsJoinedByString:#""];
NSLog(#"%#",string);

Answer 2

use like this
const char *sqlStatement = Select * from mydata where col_1 = '365'";
sqlite3_stmt *compiledStatement;
if(sqlite3_prepare_v2(database, sqlStatement, -1, &compiledStatement, NULL) == SQLITE_OK)
{
while (sqlite3_step(compiledStatement) == SQLITE_ROW)
{
nsstring *t1 = [NSString stringWithFormat:#"%s",(char*)sqlite3_column_text(compiledStatement, 1)];