#Console calculator multi operator code

The numbers entered should be separated by a space, like 6 14 98.The user can input as many operands or numbers to be added as required.

Print('Enter a number for valid input! ') #since division and expression take input differently Now we need to convert the string values in the list to integer values so that operations can be performed on them.So we traverse through the list and replace 'p' with the previous value. The user can input the letter 'p' to use the previously calculated value.So input('Enter values: ').split() returns a listĮxample: Addition -> input('Enter values: ') 44 7 9.split() method splits a string into a list based on a separator.Since we're using space as the separator between multiple values, we split the input into different values by using split() method. input('Enter values: ') takes the input values from the user in the form of a string.After the user chooses among operations 1,2,3,4,5, we need to take in the operands values to perform the calculations.If any input other than a number is entered, it will raise an exception and prompt the user to enter only numbers.Operation = int(input(' Choose the operation : 1/2/3/4/5/6 1. Initially variable will hold the value '0'. Use a variable to hold the value of the calculation so that it can be used in the next calculation. The user can use the previously computed value in the following calculations. The calculator application prompts the user to enter the operation and operands or the expression till the exit option 6 is entered. To input an expression to be evaluated, the user has to choose option 5 and to exit, user has to choose option 6. Option 3 multiplies numbers and option 4 is used to perform division. To add a set of numbers, user has to choose option 1 and to find out the difference of numbers, user should select option 2. Print the choices and take the input choice If the last calculated value was 5, then 'p' can be used to refer to this value The user can use this value in further calculations by using the letter 'p' in its place. The application can store the resultant value after a calculation.It can evaluate simple mathematical expressions like 8 + 9 - 6 ** 7 (** stands for power operation).This application can perform basic arithmetic operations like addition, subtraction, multiplication and division.For example, if your input is 2*3+1, you first calculate 2 × 3, which is okay, and then you calculate 3 + 1, which isn't okay: You want to calculate 6 + 1 here.We build a console calculator application using Python Programming Language in this article. That's bad.Īnother problem is that you always operate on two adjacent numbers, but that's not what you want. The index 2*loop -1 will go out of bounds on the first number. It is clear that the index 2 * loop can go out of bounds. You have two independent arrays, one for numbers, one for operators. In ASCII that's 43.Ĭalculation: There is also a problem with how you calculate your result.

#Console calculator multi operator code

The notation '+' means the character code of the plus sign. Double quotations marks enclose strings, that is pointers to the first character of an array of characters. Strings versus characters: C distinguishes between single and double quotation marks. In that case, the next scanf starts before the unrecognized input, which will probably trip up your syntax. 'Nothing read' means that there is input, but it can't be converted to a number, for example 'four'. You should also check the result, which would be 1 for '1 item read', 0 for 'nothing read' ot EOF for 'end of input', for example when the user hits Ctrl-D or Ctrl-Z. The operator &number_in creates such a pointer: scanf('%d', &number_in) // like above, but now on a correct number_in So scanf must store the scanned data by other means: You must pass a pointer to the data you want to scan. One way would be to return the scanned number, but scanf can read multiple inputs, so it chose to return a value that tells you whether the scanning was successful. When you read the input, the scanning function must be able to modify number_in. Your input is a whole number, an int, not a pointer to an int. Scanning the input: Your data input looks like this: int *number_in You can learn about some of them when you enable warnings. There are many problems with your program.