I need some help with C++ (I'm a beginner)
Author
I''m programming with DJGPP and Allegro. So keep in mind everything you know might not work for me.
But how do I "analys" a string. I.e. "Building"
how do I get the amount of letters from that string(8).
And how do I read i.e. the 5th letter(d).
In qbasic and VB it''s:
len(string) for the lenght of the string and
mid(string,x,y) x=where to start at the string, y= how many letters to read i.e. mid("House",3,2)="us"
But how do I do it i c++?
You can handle strings as array of char. But there are also some string functions in :
strlen(char *string) --> Length of string (must be 0 - terminated)
strcpy()
strcat()
..
if you want to get the 5th letter from a string like
write
Visit our homepage: www.rarebyte.de.st
GA
strlen(char *string) --> Length of string (must be 0 - terminated)
strcpy()
strcat()
..
if you want to get the 5th letter from a string like
char string[]write
string[4] Visit our homepage: www.rarebyte.de.st
GA
quote:Original post by MindWipe
In qbasic and VB it''s:
len(string) for the lenght of the string and
mid(string,x,y) x=where to start at the string, y= how many letters to read i.e. mid("House",3,2)="us"
But how do I do it i c++?
strlen(string) in C is equivalent to len(string) in BASIC.
mid(string, x,y) is a lot more complex. In order to -read- a substring in C, you would probably use strncmp (compare a given number of characters in 2 strings). But there''s no simple way to do the equivalent of this:
myVBString = "abCDef"mid(myVBString, 3, 2) = "cd"print myVBString ''will show "abcdef" I forget whether DJGPP is C or C++. If it''s C++, you might have better luck with the standard C++ string class, as that is better for working with. C doesn''t really handle ''strings'' as such, just arrays of characters, and therefore moving things around in the middle is a chore.
quote:Original post by Kylotan
But there''s no simple way to do the equivalent of this:myVBString = "abCDef"mid(myVBString, 3, 2) = "cd"print myVBString ''will show "abcdef"
I wouldn''t be so sure
I have a string library that I wrote that rivals that of string.h (it has much cooler functions). If you want it, email me.--------------------
You are not a real programmer until you end all your sentences with semicolons;
Visit the ROAD Programming Website for more programming help.
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