atoi char and string to int
2012-09-17 20:51
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atoi
<cstdlib>int atoi ( const char * str );
Convert string to integer
Parses the C string str interpreting its content as an integral
number, which is returned as an int value.
The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from this character, takes an optional initial plus or minus sign
followed by as many numerical digits as possible, and interprets them as a numerical value.
The string can contain additional characters after those that form the integral number, which are ignored and have no effect on the behavior of this function.
If the first sequence of non-whitespace characters in str is
not a valid integral number, or if no such sequence exists because either str is empty or it contains only whitespace characters,
no conversion is performed.
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