Concept explainers
“stoi” function:
In C++, the predefined function “stoi” is used to convert a string value into an integer value; it contains three parameters to refer the string to convert, position of first character in the string after the number.
Syntax:
Consider the syntax for the “stoi” function is as follows:
int stoi ( const string& n, size_t* s = 0, int base = 10);
In the above statement,
- “int” represents the return type of the function.
- The first parameter “const string& n” represents the string to be converted.
- The second parameter “size_t* s” represents the position of first character in the string after the number and this argument is an optional one.
- The third parameter “base” represents the base of the conversion and this argument is an optional one.
Example:
Example for the “stoi” function is as follows:
//declare and assign the value to the variable
string s = "5478hai";
//change the string object to an integer value.
int n = stoi(s);
In the above code, the string value “5478hai” stored in the variable “s” is converted into an integer and stored and into the variable “n”; the above statement results the value “5478”.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
Starting Out With C++: Early Objects (10th Edition)
- Write a for statement to display first 5 even numbers (for example, 2, 4, 6, 8, 10)Use the variable count as the counter variable within the statement.arrow_forwardWhich of the following statements is false? * A. The value of the following expression is 3: 17 % 5 B. The value of the following expression is 0.5: 7.5 % 3.5 C. You can use the remainder operator for applications such as determining whether one number is a multiple of another. D. You can use the remainder operator to determine whether a number is odd or even.arrow_forwardFunction strlen() takes a string as an argument and returns the number of characters in the string, Which of the following is the correct answer to fill the above statement with it? Select one: a. Spaces are not included in the length calculation b. Null character is not included in the length calculation c. Numbers are not included in the length calculation d. Null character is included in the length calculationarrow_forward
- Assume the variable x has been assigned a floating-point value. Write a statement that uses the print function and an F-string to display the value of x rounded to 1 decimal point, with comma separators. For example, if x is assigned the value 123477.7891, the statement would display: 123,477.8arrow_forwardWrite a program that converts a time in 12-hour format to 24-hour format. The program will prompt the user to enter a time in HH:MM:SS AM/PM form. (The time must be entered exactly in this format all on one line.) It will then convert the time to 24 hour form. You may use a string type to read in the entire time at once, including the space before AM/PM, or you may choose to use separate variables for the hours, minutes, seconds and AM/PM.arrow_forwardWrite a main function that performs the following: • Prompts user to enter 2 values A and B. . If the first number A is less than the second number B, the main function should print the sum of all numbers multiple of 2 from 1 to A. • If the first number A is greater than the second number B, the main function should print the product of all numbers multiple of 4 from 1 to B. • If not, the main function should display "Wrong data. Try again!".arrow_forward
- For which of the following statements will the variable s contain a string data type after it is executed?arrow_forwardWrite a statement that will convert the C-string “100000” to a long and store the result in the variable num.arrow_forwardWhich line in the code tests if the character is between '0' and '9'?arrow_forward
- IZVO @ ۲:۱۰ م 50 EETE2102-Electronics-... :puäillu | E هل تريد الانضمام إلى هذا الجهاز؟ الانضمام Moodle Write a program in C that accepts: 1. the radius of a sphere in a variable say radius, 2. The choice (in a character variable choice) .If the choice is a, area of sphere should be found else the volume of the sphere should be found. area of a sphere is given by the formula: area=4 x TT x radius? and the volume of the sphere is given by the formula: volume=4/3 x radius3 Note: Create/Use appropriate header files, constants and functions Sample Output 1: Enter the radius of the sphere :1 Enter choice: a for area of sphere an Volume of sphere is 4.186667arrow_forwardPrompt user to enter a lower case letter character Convert it into Upper Case character Output the result in the following format: “Lower case f converted to upper case F”arrow_forwardGiven a String variable named brand that has been declared and initialized, write the statement needed to create a new integer variable named numChars that contains the number of characters in the String. int numChars =arrow_forward
- Np Ms Office 365/Excel 2016 I NtermedComputer ScienceISBN:9781337508841Author:CareyPublisher:CengageProgramming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:CengageC++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage Learning
- Microsoft Visual C#Computer ScienceISBN:9781337102100Author:Joyce, Farrell.Publisher:Cengage Learning,Programming with Microsoft Visual Basic 2017Computer ScienceISBN:9781337102124Author:Diane ZakPublisher:Cengage LearningC++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr