Chapter 12.3, Problem 12.8CP

a)

Explanation of Solution

“atoi” function:

In C++, the predefined function “atoi” is used to convert a string value into an integer value; it passes a string literal or character array as an argument and it converts the received value into an 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:

The syntax for the “atoi” function is as follows:

int atoi (const char* n);

In the above statement,

• “int” represents the return type of the function...

b)

Explanation of Solution

“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...

c)

Explanation of Solution

“atof” function:

In C++, the predefined function “atof” is used to convert a string value into a double-precision floating point value; it passes a string literal or character array as an argument and it converts the received value into a double type 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 the “atof” function is as follows:

double atof (const char* n);

In the above statement,

• “double” represents the return type of the function...

d)

Explanation of Solution

“itoa” function:

In C++, the predefined function “atof” is used to convert an integer value into a string literal; it contains three parameters to refer the integer to convert, pointer character to store the result, and base number to convert.

Note: It is a deprecated item in C++; so many C++ compilers are not supporting this function.

Syntax:

The syntax for the “itoa” function is as follows:

char* itoa ( int n, char* s, int base);

In the above statement,

• “char*” represents the return type of the function.
• The first parameter “int n” represents the number to be converted...