how to take big input in C (2023)

FAQs

How to take big input in C? ›

The maximum possible integer input can be taken in C using long long int. It has a range of −9,223,372,036,854,775,807 to +9,223,372,036,854,775,807. If you only deal with positive numbers then unsigned long long can be used which has a range of 0 to 18,446,744,073,709,551,615.

A long int typically uses twice as many bits as a regular int, allowing it to hold much larger numbers. printf and scanf replace %d or %i with %ld or %li to indicate the use of a long int. long int may also be specified as just long.

The getchar() function in C is similar to the getc() function in C with little difference. The getc() function can take the input of a single character from any stream. Whereas getchar in C can take input of a single character only from the standard input stream.

If you want to print a variable in C, you have to have a format code, much like formatted printing in python. printf("%lli", total); where "%lli" is the format specifier for a long long int .

C language does not provide a variable large enough to work with 100 digit numbers, so you need to sum them up one digit at a time.

The function "getch in c" is used to get a character as input from the user. The input provided by the user is not displayed on the output screen. Code execution is paused until a character is entered when a getch function is called. A getch() function returns the equivalent ASCII value for the character entered.

%d is used to print decimal(integer) number ,while %c is used to print character .

A double in c can be printed by both using %f and %lf. Both the %f format specifier and the %lf format specifier represent float and double.

%d is a format specifier, used in C Language. Now a format specifier is indicated by a % (percentage symbol) before the letter describing it. In simple words, a format specifier tells us the type of data to store and print. Now, %d represents the signed decimal integer.

What does %U print in C? ›

If you need to use a large number, you can use a type specifier long . Here's how: long a; long long b; long double c; Here variables a and b can store integer values.

you can also use "unsigned long long" with format specifier "llu". It works fine for 12 digit number in C.

convert the two 50 digits number into arrays, storing them into arrays a for first number and b for second number. now start traversing a and b in reverse order and using num1 and num2 add the array elements of both a, b and carryOver.

The getch() method is required by various c compilers, such as turbo c. In order to read the character and allow us to view the output on the screen, a getch is used to hold the output screen and wait until the user provides any form of input (i.e., until the user presses any key).

The getch() function is very useful if you want to read a character input from the keyboard. While this is not a part of the C standard, this is still a POSIX C function. So, we can still use this function from Windows / Linux / Mac. Let's take a look at using this function, using a few examples.

The getchar() is capable of reading from the standard input. Hence, getchar() becomes equivalent to the getc(stdin). The getch() is capable of reading a single character from any given keyboard. Since it doesn't make use of any buffer, the entered character returns immediately without having to wait for the enter key.

Should I learn C or C++? ›

Compared to C, C++ has significantly more libraries and functions to use. If you're working with complex software, C++ is a better fit because you have more libraries to rely on. Thinking practically, having knowledge of C++ is often a requirement for a variety of programming roles.

It provides a straightforward, consistent, powerful interface for programming systems. That's why the C language is widely used for developing system software, application software, and embedded systems. The C programming language has been highly influential, and many other languages have been derived from it.

When passed as part of a `scanf` format string, “%*c” means “read and ignore a character”. There has to be a character there for the conversion to succeed, but other than that, the character is ignored. A typical use-case would be reading up to some delimiter, then ignoring the delimiter. For example: char s[20];

Float is a datatype which is used to represent the floating point numbers. It is a 32-bit IEEE 754 single precision floating point number ( 1-bit for the sign, 8-bit for exponent, 23*-bit for the value.

%d stands for decimal and it expects an argument of type int (or some smaller signed integer type that then gets promoted). Floating-point types float and double both get passed the same way (promoted to double ) and both of them use %f .

To declare floating point variables and assign the values to the variable, use the float keyword, followed by key=value pairs of the variable name and value, each separated by a comma (,). float firstinterest=8.15, secondinterest=15.5; //it will print 6 digit decimal number after the decimal points.

%d and %f are format specifiers. %d is used for integer(-3,-100,3,100,etc). And %f is used for float(10.6,-39.0,etc).

The %u format specifier is implemented for fetching values from the address of a variable having an unsigned decimal integer stored in the memory. It is used within the printf() function for printing the unsigned integer variable.

Memo is the data type that has the largest storage capacity. It provides storage for variable length and arbitrary format data. There are two variations to Memo datatype: CLOB and BLOB data types. CLOB( Character Large Object) are used for storing text.

How to use length () in C? ›

String Length in C Using Built-In Library Function

The length of a string can be found using the built-in library function strlen() in string. h header file. It returns the length of the string passed to it (ignoring the null character). The string is passed to the strlen() function, which returns its length.

void (C++)

When used as a function return type, the void keyword specifies that the function doesn't return a value.

The max() function returns the greater of two values. The max() function is for C programs only.

We can print a string in C using puts(), printf(), for loop, and recursion method. We have to pass a string character array name in the puts() function as an argument to print the string in the console. We can use the %s format specifier in the printf() function to print the character array in the console.

This number mentioned, 18,446,744,073,709,551,615 , is actually 2^64 − 1 . The important thing here is that 2^64-1 is essentially 0-based 2^64 . The first digit of an unsigned integer is 0 , not 1 .

The INTEGER data type stores whole numbers that range from -2,147,483,647 to 2,147,483,647 for 9 or 10 digits of precision. The number 2,147,483,648 is a reserved value and cannot be used. The INTEGER value is stored as a signed binary integer and is typically used to store counts, quantities, and so on.

Even longer integers: long long

The long long data type is overkill for just about every application, but C will let you use it anyway. It's capable of storing at least −9,223,372,036,854,775,807 to 9,223,372,036,854,775,807.

How to write long strings in Multi-lines C/C++? Long strings can be written in multiple lines by using two double quotes ( “ “ ) to break the string at any point in the middle.

How to convert long data type into int? ›

Perhaps the easiest way of getting the number of digits in an Integer is by converting it to String, and calling the length() method. This will return the length of the String representation of our number: int length = String. valueOf(number).

While integers can be as large as 2,147,483,647 and as low as -2,147,483,648 (stored as 32 bits), a long integer has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (stored as 64 bits).

The C++ standard only guarantees that the minimum size for long long int will be 64-bits. This is also by far the most common size. With a 64-bit size, the maximum number that can be represented will be 2^63 - 1 , which equals 9223372036854775807 .

public int length()

The length() method is used to get the length of this string. The length is equal to the number of Unicode code units in the string. Return Value: the length of the sequence of characters represented by this object.

long: The long data type is a 64-bit signed two's complement integer. It has a minimum value of -9,223,372,036,854,775,808 and a maximum value of 9,223,372,036,854,775,807 (inclusive). You should append 'l' or 'L' to the value explicitly used to initialize the variable; even as small as 0.

The maximum length of a string literal allowed in Microsoft C is approximately 2,048 bytes.

We are using printf() function to get the length. The printf() function returns the number of character it has printed. If we print only that string using a printf() function, we can easily get the length of it.

The atoi() function converts a string data type to integer data type in the C language. The syntax of this function is: int atoi((const char * str); Here, str is of type pointer to a character.

Can I use int instead of long? ›

Traditionally, the "int" type is the "natural" type for the processor - i.e., it's the size of the processor's registers. This can be 4, 8, 16, 32... bits, but usually the processor can handle it as fast as possible. Type "long" is for when you need more precision, even at the expense of slower code.