Starting Out with C++ from Control Structures to Objects (9th Edition)
Starting Out with C++ from Control Structures to Objects (9th Edition)
9th Edition
ISBN: 9780134498379
Author: Tony Gaddis
Publisher: PEARSON
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Chapter 10.5, Problem 10.13CP
Program Plan Intro

“atol” function:

In C++, the predefined function “atol” is used to convert a string value into a long integer value; it passes a string literal or character array as an argument and it converts the received value into a long integer value; it takes only one parameter as an argument.

  • If the argument value contains nonconvertible contents combined with the integer value then the values will be ignored while converting.
  • In same way, the function will return “0” when the values can’t be able to convert into double data type.

Syntax:

Syntax for “atol” function is as follows:

long int atol (const char* n);

In the above statement,

  • “long int” represents the return type of the function.
  • “atol” represents the name of the function.
  • “const char*” represents the data type of the passing argument.
  • “n” is a string variable which is required to be converted.

Example:

The example for the “atol” function is as follows:

//change the string literal to a long type value

long n = atol ("123456 hello");

In the above line, the string literal “123456 hello” is passed as an argument to “atol” and it returns the converted value that is “123456”; here the “atol” function ignores the whitespace and the nonconvertible value “hello”.

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Chapter 10 Solutions

Starting Out with C++ from Control Structures to Objects (9th Edition)

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