FAQ Database Discussion Community

Set precision dynamically using sprintf

c,printf,format-string
Using sprintf and the general syntax "%A.B" I can do this: double a = 0.0000005l; char myNumber[50]; sprintf(myNumber,"%.2lf",a); Can I set A and B dynamically in the format string?...

Add linebreak or newline in Instagram text from objective-c text

ios,objective-c,string,instagram-api,format-string
I'm using the Instagram API from Xcode but I can not insert a line break in text using \n. Can anyone help me adding a new line in the caption/comment on instagram text from XCode? NSString *repostText = [NSString stringWithFormat:@"#Repost %@ com #AppRepost.\r\n ・・・ \r\n", userNameStr]; ...

Convert datetime to string always defaults to system time zone offset, Need to get the users timezone offset in the result

c#,timezone,offset,timezoneoffset,format-string
I have a code where the user enters the DateTime and the timezone in which the dates needs to be converted to and the format in which the end date should be. Below is the code. The code converts the DateTime perfectly to the timezone the user has entered but...

Why is the format of %p and %x different in a format string?

c,printf,format-string
When printing a hexadecimal value (%x) and an address (%p), the format is slightly different. The printed value does not start with 0x in the case of a hexadecimal value: int main() { int x = 0x1234; printf("Value of x: %x\n", x); printf("Address of x: %p\n", (void*)&x); } yields (gcc):...