在C或C ++中，我如何在没有输入或空格的情况下为程序提供输入

Question

i want to write a program in which i will give the input as 109876543 and the program will calculate the sum by adding each digit in the given input (1+0+9+8+7+6+5+4+3). so how to separate these digit and add them and which data type to choose to store this input??

Answer 1

Have a look at ncurses (you might also like the Wikipedia entry ).
On Windows there's the equivalent pdcurses .

Store the input in an array of character (not necessarily a string).

Answer 2

[for C]

Go for unbuffered I/O:

• Define an int to hold the sum and initialise it to 0 .
• Use select() to test if there is something to read from fileno(stdin) .
• Use read() to read in exactly one char .
• Use isdigit() to test whether it's a number and if substract 48 and add the result to the sum.
• Start over.