The dec() method of stream manipulators in C++ is used to set the baseline format flag for the specified str stream. This flag sets the baseline for Decimal numbers. Hence the output shows the number in Decimal base.
Syntax:
ios_base& dec (ios_base& str)
Parameters: This method accepts str as a parameter which is the stream for which the format flag is affected.
Return Value: This method returns the stream str with internal format flag set.
Example 1:
// C++ code to demonstrate // the working of dec() function #include <iostream> using namespace std;
int main()
{ // Initializing the number
int n = 321;
// Using dec()
cout << "dec flag: "
<< dec << n << endl;
return 0;
} |
Output:
dec flag: 321
Example 2:
// C++ code to demonstrate // the working of dec() function #include <iostream> using namespace std;
int main()
{ // Initializing the number
int n = -321;
// Using dec()
cout << "dec flag: "
<< dec << n << endl;
return 0;
} |
Output:
dec flag: -321
Reference: http://www.cplusplus.com/reference/ios/dec/