C/C++ Commonly Used Libraries

This document references the C/C++ libraries most commonly used in CSCI 1301 and CSCI 1302. Each library name is accompanied by a description of its purpose and the functions/identifiers most commonly used from that library.

Library file Description Common functions/identifiers

iostream Basic input and output operations
cin, cout, cerr
<< insertion operator
>> extraction operator
endl
getline() string input function
ios flags: fixed, scientific, showpoint, noshowpoint

iomanip Output formatting manipulators
setprecision(n)
setw(n)

conio Console (monitor) controls
clrscr();

cstdlib Standard library functions
abs(integervalue); labs (longvalue);
exit(status);
rand(); srand(seed);
atof(charvalue); atoi(charvalue); atol(charvalue);

cmath Mathematical functions and formulas
pow(base, exponent);
sqrt(value);
fabs(floatvalue); dabs(doublevalue);
log(value); exp(value); // natural logarithm and e^x
log10(value);
sin(value); cos(value); tan(value);
asin(value); acos(value); atan(value);
sinh(value); cosh(value); tanh(value); // hyperbolic functions
ceil(value); floor(value);

cctype Character manipulation functions
isalpha(value); isdigit(value); isalnum(value); isspace(value); iscntrl(value); ispunct(value);
toupper(charvalue); tolower(charvalue);

string String class and associated operations
string data type

vector Vector class and associated operations
vector data type

fstream Text file classes and associated operations

Library file	Description	Common functions/identifiers
iostream	Basic input and output operations	cin, cout, cerr << insertion operator >> extraction operator endl getline() string input function ios flags: fixed, scientific, showpoint, noshowpoint
iomanip	Output formatting manipulators	setprecision(n) setw(n)
conio	Console (monitor) controls	clrscr();
cstdlib	Standard library functions	abs(integervalue); labs (longvalue); exit(status); rand(); srand(seed); atof(charvalue); atoi(charvalue); atol(charvalue);
cmath	Mathematical functions and formulas	pow(base, exponent); sqrt(value); fabs(floatvalue); dabs(doublevalue); log(value); exp(value); // natural logarithm and e^x log10(value); sin(value); cos(value); tan(value); asin(value); acos(value); atan(value); sinh(value); cosh(value); tanh(value); // hyperbolic functions ceil(value); floor(value);
cctype	Character manipulation functions	isalpha(value); isdigit(value); isalnum(value); isspace(value); iscntrl(value); ispunct(value); toupper(charvalue); tolower(charvalue);
string	String class and associated operations	string data type
vector	Vector class and associated operations	vector data type
fstream	Text file classes and associated operations

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