get_int - prompt a user for an int

get_int - prompts user for a line of text from stdin and returns the equivalent int


Header File

#include <cs50.h>


int get_int(string prompt, ...);

#include <cs50.h>

int get_int(const char *format, ...);


This function prompts the user for an int. If the user inputs anything other than an int (or a value that cannot fit in an int), the function prompts the user again.

This function expects at least one argument, prompt. If prompt contains any format codes, a la printf, this function accepts additional arguments as well, one per format code.

Prompts user for a line of text from standard input and returns the equivalent int; if text does not represent an int or would cause overflow, user is reprompted.

The prompt is formatted like printf(3).


This function returns the user’s input as a int.

Returns the int equivalent to the line read from stdin in [INT_MIN, INT_MAX). If line can’t be read, returns INT_MAX.


#include <cs50.h>
int main(void) { int i = get_int("Input: "); printf("Output: %i\n", i); }
 * Returns the sum of two ints read from stdin, or INT_MAX if there was an error.
int add_ints(void)
    // read int from stdin
    int i = get_int("Enter an int: ");

    // make sure we read one successfully
    if (i == INT_MAX)
        return INT_MAX;

    int j = get_int("What do you want to add %d to? ", i);

    if (j == INT_MAX)
        return INT_MAX;

    return i + j;


get_char(3), get_double(3), get_float(3), get_long(3),
get_string(3), printf(3)