implicit declaration of function getint() is invalid in c99

Question

#include <cs50.h>
#include <stdio.h>
int main (void)
{
    printf("get the value of x \n");
    int x = getint();
    printf("y \n");
    int y = getint();
    printf("addition of %d and %d is %d \n", x,y, x+y);
    return 0;
}

//error msg
//adder.c:6:13: error: implicit declaration of function 'getint' is invalid in C99
  [-Werror,-Wimplicit-function-declaration]
int x = getint();
        ^
1 error generated.
jharvard@appliance (~/Downloads): 

Answer 1

That's GetInt(), not getint(). C is case sensitive.