Thread: Very new at this, need help with if/else

Hello, I'm just starting this whole c programming and I've looked at alot of tutorials and still can't figure out a way to get this basic program to work properly. It keeps saying I have an error somewhere. I tried combining all the conditions in one line as such:

If (d=28; d=29; d=30; d=31);

I've also tried it with or in there and most recently I tried using if/else if/else statements and that didn't work. This is what I currently have:

Code:

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

int
main(void)
{
    printf("How many days in month?");
    int d = GetInt();
    if (d=28)
    {
    printf("Days in months were: %d\n", d);
    }
    if (d=29)
    {
    printf("Days in months were: %d\n", d);
    }
    else if (d=30)
    {
    printf("Days in months were: %d\n", d);
    }
    else if (d=31)
    {
    printf("Days in months were: %d\n", d);
    }
    else
    {
    printf("Invalid number of days\n");
    }
    return 0;
}

If someone could guide me in the right direction I would really appreciate it! Thanks!

Like this:

Code:

if(d>=28 && d<=31)

Hmm... so simple. I tried == when I tried listing them on the same line but never after I separated them and that worked. Thank you!