I have some code
whereCode:char szSub[255]; _snprintf( szSub, sizeof szSub, "SQ.%s. .CSCO", m_szPart );
I want to change this function so I pass in a string which is used to build the string that is being built here. For instance...Code:char m_szPart[255];
rather then CSCO in SQ.%s. .CSCO I could pass in MSFT and SQ.%s. .MSFT would be built. How could I do this?
Last edited by mhandlon; 04-10-2006 at 07:49 AM.
So do
"SQ.%s. .%s",
And pass a 2nd string to your function as either "CSCO" or "MSFT"
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
ok I passed in the string ss but when I debug..
Is showing up asCode:_snprintf( szSub, sizeof szSub, "SQ.%s. .%s", m_szPart, ss );
+ szSub 0x0012f8d4 "SQ.TEST. .(null)" char [255]
Did you make ss point at anything, or just declare it?
char * ss;
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
It's declared as a string, I decided the call it sSymbol instead ss not a good name.
From main the function is being called from...Code:bool PriceTest::GetFeed(string sSymbol) { printf( "example is using CSCO as a stock symbol\n" ); char szSub[255]; _snprintf( szSub, sizeof szSub, "SQ.%s. .%s", m_szPart, sSymbol );
I checked and sSymbol is assigned the value “CSCO” ?Code:PriceTest tc; tc.GetFeed("CSCO");
What am I missing?
The fact that your compiler is probably generating a warning?
The fact that printf style functions, when seeing a %s expect a char*, not a c++ string?
Why are you even messing with snprintf when you have C++ strings to start with?
If you're still insistent on old-school, try
Code:_snprintf( szSub, sizeof szSub, "SQ.%s. .%s", m_szPart, sSymbol.c_str() // get a const char * from the c++ string );
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
