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Questions tagged [cout]

std::cout is the global stream object provided by the C++ standard library for writing to the standard output stream.

For more general questions about std::ostream use the or tags.

Bjarne Stroustrup, the creator of C++, explains that cout is pronounced "see-out" and the "c" stands for "character". (wcout is used for wide character output to the standard output stream)

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How to print Unicode character in C++

I am trying to print a Russian "ф" (U+0444 CYRILLIC SMALL LETTER EF) character, which is given a code of decimal 1092. Using C++, how can I print out this character? I would have thought something along the lines of the following would work,…
James Raitsev
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C++ alignment when printing cout <<

Is there a way to align text when printing using std::cout? I'm using tabs, but when the words are too big they won't be aligned anymore. Sales Report for September 15, 2010 Artist Title Price Genre Disc Sale Tax Cash Merle Blue …
user69514
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Why is address of char data not displayed?

class Address { int i ; char b; string c; public: void showMap ( void ) ; }; void Address :: showMap ( void ) { cout << "address of int :" << &i << endl ; cout << "address of char :"…
user478571
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what does cout << "\n"[a==N]; do?

In the following example: cout<<"\n"[a==N]; I have no clue about what the [] option does in cout, but it does not print a newline when the value of a is equal to N.
Siva Prasad
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how does cout << actually work?

I was wondering how std::cout is able to use << as it does. My main puzzlement is with whether std::cout as an instance of something. Basically, how is << defined? If I do this for a custom class, I need an instance of some sort... I could see…
Ori
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c++ force std::cout flush (print to screen)

I have code such as the following: std::cout << "Beginning computations..."; // output 1 computations(); std::cout << " done!\n"; // output 2 The problem, however, is that often output #1 and output #2 appear (virtually)…
synaptik
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Floating point format for std::ostream

How do I do the following with std::cout? double my_double = 42.0; char str[12]; printf_s("%11.6lf", my_double); // Prints " 42.000000" I am just about ready to give up and use sprintf_s. More generally, where can I find a reference on std::ostream…
Jive Dadson
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mixing cout and printf for faster output

After performing some tests I noticed that printf is much faster than cout. I know that it's implementation dependent, but on my Linux box printf is 8x faster. So my idea is to mix the two printing methods: I want to use cout for simple prints, and…
Jabba
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getting cout output to a std::string

I have the following cout statement. I use char arrays because I have to pass to vsnprintf to convert variable argument list and store in Msg. Is there any way we can get cout output to C++ std::string? char Msg[100]; char appname1[100]; char…
venkysmarty
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std::cout won't print

Is there any circumstance when std::cout << "hello" doesn't work? I have a C++ program where std::cout doesn't seem to print anything, not even constant strings (such as "hello"). Is there any way to check if cout is able/unable to open the stream?…
mahmood
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std::cout to print character N times

How can I print a character N number of times using std::cout without looping? Is there a way to move the text cursor back to nullify the effect of std::cout << std::endl;? i.e. to move up a line (say we never printed anything after doing the…
shiraz
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How to remove last character put to std::cout?

Is it possible on Windows without using WinAPI?
Xirdus
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cout or printf which of the two has a faster execution speed C++?

I have been coding in C++ for a long time. I always wondered which has a faster execution speed printf or cout? Situation: I am designing an application in C++ and I have certain constraints such as time limit for execution. My application has loads…
pirate
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How to cout a float number with n decimal places

Possible Duplicate: How do I print a double value with full precision using cout? float a = 175.; cout << a; If I run the previous code I'll get just 175, how can I cout the number with (for example) 3 decimal places even they were zeros ..…
Muhammad Barrima
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how to print a string to console in c++

Im trying to print a string to console in c++ console application. void Divisibility::print(int number, bool divisible) { if(divisible == true) { cout << number << " is divisible by" << divisibleBy << endl; } else { …
AngryDuck
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