#include <stdio.h>
#include <cs50.h>

int main (void)
{
    int i = get_int("Integer: ");
    printf("hello, %i\n", i);
}

$ make int
clang -fsanitize=signed-integer-overflow -fsanitize=undefined -ggdb3 -O0 -std=c11 -Wall -Werror -Wextra -Wno-sign-compare -Wshadow    int.c  -lcrypt -lcs50 -lm -o int
int.c:5:13: error: implicit declaration of function 'get_int' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    int i = get_int("Integer: ");
            ^
int.c:6:21: error: more '%' conversions than data arguments [-Werror,-Wformat]
    printf("hello, %i\n");
                   ~^
int.c:5:9: error: unused variable 'i' [-Werror,-Wunused-variable]
    int i = get_int("Integer: ");
        ^
3 errors generated.
make: *** [int] Error 1