ending lines

This is a discussion on ending lines within the C Programming forums, part of the General Programming Boards category; I need to output the following to a screen: SUN MON TUE WED THU FRI SAT 1 2 3 4 ...

  1. #1
    JFK
    JFK is offline
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    Oct 2001
    Posts
    15

    Question ending lines

    I need to output the following to a screen:

    SUN MON TUE WED THU FRI SAT
    1 2 3 4
    5 6 7 8 9 10 11
    12 13 14 15 16 17 18
    19 20 21 22 23 24 25
    26 27 28 29 30 31

    this is my code so far:

    #include<stdio.h>
    #include<conio.h>

    main()
    {

    int first_day,
    days_in_month;


    printf("Enter day on which the 1st falls 1 = Sunday 2 = Monday etc : ");
    scanf("%d", &first_day);

    printf("How many days the month? : ");
    scanf("%d", &days_in_month);

    printf("\n SUN MON TUE WED THU FRI SAT\n");

    int columns = 1;


    while (columns <= first_day -1)
    {
    printf(" ");
    columns += 1;
    }

    int day_index = 1;

    while (day_index <= days_in_month)
    {
    if (columns = 7)
    {
    printf("%4d", day_index);
    columns = 1;
    printf("\n");
    }
    else
    {
    printf("%d", day_index);
    columns += 1;
    }
    day_index += 1;
    }
    getch();

    }
    It's not ending the line as I need it to. Any suggestions?




  2. #2
    and the hat of int overfl Salem's Avatar
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    Code:
    #include<stdio.h> 
    #include<conio.h> 
    int main() { 
        int first_day, days_in_month; 
        int columns = 1; 
        int day_index = 1;      // should be declared here - this is C, not C++
        printf( "Enter day on which the 1st falls 1 = Sunday 2 = Monday etc : " ); 
        scanf( "%d", &first_day ); 
        printf( "How many days the month? : " ); 
        scanf( "%d", &days_in_month ); 
        printf( "\n SUN MON TUE WED THU FRI SAT\n" ); 
        while(columns <= first_day -1) { 
            printf( "    " );
            columns += 1; 
        } 
        while(day_index <= days_in_month) { 
            if(columns == 7)   // should be == 
                { 
                printf( "%4d", day_index ); 
                columns = 1; 
                printf( "\n" ); 
            } else { 
                printf( "%4d", day_index );   // print this in a 4 width as well
                columns += 1; 
            } 
            day_index += 1; 
        } 
        getch( ); 
    }
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
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