StrFmt

Format a string with a format specifier and a variable number of parameters.

string StrFmt(const char* pszFmt, ...);

void StrFmt(string& str, const char* pszFmt, ...);

Parameters

• pszFmt - character array of formatting information
• str - reference to string to provide output
• ... - variable number of parameters to fill in formatting specifiers

Return Value

• First version returns the formatted string. Second version does not return anything since the formatting passed string reference is used to get the result.

Remarks

This is basically a wrapper around sprintf to provide the flexibility of formatting with some safety measures built in. If string parameters are used the ".c_str()" method will be needed to convert this to C style strings. Refer to ​http://www.cplusplus.com/reference/clibrary/cstdio/printf/ for formatting specifiers.

Example

int nVal = 123;
string strID = "ABC";

string strMsg;
strMsg = StrFmt("Number: %d ID: %s", nVal, strID.c_str());

The version of StrFmt shown below that takes a reference to the string as a parameter is more efficient. This is because it doesn't have to create the string, and pass it as a return value to tbe recreated.

int nVal = 123;
string strID = "ABC";

string strMsg;
StrFmt(strMsg, "Number: %d ID: %s", nVal, strID.c_str());

See Also

• StrFmtLen
• StrToInt
• StrToFloat