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CSE390C Midterm Cheat Sheet handout #2
some common string operations:
output << str; insert str onto output stream
input >> str; extract str from input stream (one token)
getline(input, str) read into str one line from input
str.empty() is str empty?
str.size() how many characters in str?
str[index] reference to character at given index
str1 + str2 result of adding two strings (a new string)
==, !=, <, >, <=, >= relational operators to compare two strings
istringstream input(str) make an input stream from the given string
str.substr(index, n) string of n characters starting at index
str.substr(index) string of characters starting at index
str.find(str2) first occurrence of str2 in str or -1
str.rfind(str2) last occurrence of str2 in str or -1
some common vector operations:
v.push_back(n) append n to end of vector
v.empty() is v empty?
v.size() how many elements in v?
v[index] reference to value at given index
==, != compares all values for equality
some common stream operations:
ifstream input(name); initializes ifstream to read from given file
ofstream output(name); initializes ofstream to write to given file
stream >> x; read (extract) x from given input stream
stream << x; write (insert) x to given output stream
getline(input, str) read into str one line from input
stream.open(name); opens the stream to the given file
stream.close() closes the stream
istringstream input(str) make an input stream from the given string
ostringstream output() make an output stream that will go to a string
stream.str() convert an ostringstream to a string
some common math functions:
abs(x) returns the absolute value of x
max(x, y) returns the larger of x and y
min(x, y) returns the smaller of x and y
pow(x, y) returns the value of x to the power of y
round(n) rounds to the nearest integer
sqrt(n) returns the square root of n
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