C Language question

[Ryanandrei]

Ano po maganda alternative sa pointer? saka pa-explain nung sa huling nakabold. tyia!

#include <stdio.h>
main()
{
    int d, m, y, i;
  int month[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; 
[B]    char** day[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};[/B]
    printf("Fill in a date after 01-01-1900 as dd-mm-yyyy: ");
    scanf("%d-%d-%d",  &d, &m, &y);

    if (y % 4 == 0 && (y % 100 != 0 || y % 400 == 0))
        month[1] = 29;
    if (y < 0 || m < 1 || m > 12 || d < 1 || d > month[m])
    {
        printf("Invalid date.\n");
        return 1;
    }
    for (i = 1900; i < y; i++)
        if (i % 4 == 0 && (i % 100 != 0 || i % 400 == 0))
            d += 366;
        else
            d += 365;
    for (i = 0; i < m - 1; i++)
        d += month[i];

[B]    printf("This is a %s.\n", day[d % 7]);[/B]
    return 0;
}

 

[aQudei]

Do this code works correctly?

 

[denmau09]

copy paste mo lang ba yan?

 

[muthym]

@TS
Do you know what is a pointer?

Study math/arithmetic operators esp. % (percent), C data types, naming variables, format specifiers, arrays and strings in C (Use Google).

if the code is ... printf("You are handsome!"); ... what do you think is the output of this? if you don't know the output of this code, it means you are not handsome

if a=123....

printf("This is number %d", a);

What the do you think is the output of the above code?

So, what is the use of %d?

In your code... printf("This is a %s.\n", day[d % 7]);, what do you think is %s?

if day[] is ... day[] = {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};?

As an example:

if 1+1=2... if 2-1=1... if 1*2=2... if 2/2=1...

Now, if 5%2 is 1 because 5/2 is 2, what is 11%4, if 11/4 is 2?

Now, what is the value of tip[11%4] if tip variable (which is an array)?

tip[0]="YOU"
tip[1]="NEED"
tip[2]="TO"
tip[3]="STUDY"
tip[4]="HARD"

 

[Ryanandrei]

Ok na po. nagsearch ako kahapon. naiexplain ko naman. ty btw