The sprintf() function isn’t type-safe, it doesn’t support user-defined types and it’s a common source of buffer overflow bugs. In C++, there’s a better alternative to sprintf(), namely stringstream objects. The following function template accepts a value of any type and writes it into a user-supplied string s:
#include using namespace std;template void string_fmt(string & s, const T & t){ ostringstream oss; // create a stream oss
size=3>
In the following example, the value 10.76 is written into the string s using the string_fmt() function template:
string s;string_fmt(s,10.76);
size=3>
The following cast_stream function template performs the opposite operation. It converts a variable of type in_value to a variable of type out_type. In the following example, cast_stream converts a string to a double:
template out_type cast_stream(const in_value & t){ std::stringstream ss; ss > ret; // write value to ret return ret;}string s=