Some examples on printf().

int r,a=10;

    1)      r=printf(“Wel”);

printf(“\n r=%d”,r);

Output---à       Wel

                                r=3

    2)      r=printf(“Wel”,”come”);

printf(“\n r=%d”,r);

Output---à       Wel

                                r=3

    3)      r= printf(“Wel””come”);

printf(“\n r=%d “,r);

Output---à       Welcome

                                r=7

    4)      r=printf(“Wel \n come”);

printf(“\n r=%d”,r);

Output---à       Wel

                                come

                                r=8

    5)      r=printf(“Wel\t %s”,”come”);

printf(“\n r=%d”,r);

Output---à       wel                         come

                                r=8

    6)      r=printf(“Wel %d”,printf(“Frndzone”);

printf(“\n r=%d”,r);

Output--à         Frndzonewel4

                                r=4

    7)      r=printf(“%d %d”,printf(“Frndzone”),printf(“Education”));

printf(“\n r=%d”,r);

Output------à EducationFrndzone49

                                r=2

    8)      r=printf(“%d”,printf(“Wel %d”,a);

printf(“\n r=%d”,r);

Output-----à    Wel105

                                r=1

    9)      r=printf(“a=%d”,printf(“wel%d”,printf(“come”)));

printf(“\n r=%d”,r);

Output------à comewel4a=4

                                r=3

   10)   void main()

{

int a=10,b=5;

clrscr();

printf(“a=%d”,a,b);

getch();

}

Output------à a= 10

NOTE:- When outside value is more than format specifier than extra value automatically ignore.

   11)   void main()

{

int a=5;

clrscr();

printf(“%d%d”,a);

getch();

}

Output---à 5,  (86)à garbage value

   12)   r=printf(“%d: %c”,printf(“Wel”),67);

printf(“\n r=%d”,r);

Output-----à    Wel3:C

                                r=3

   13)   r=printf(“%d \n %d”,printf(“%d”,printf(“come”)),printf(“education”));

printf(“\n r=%d”,r);

Output-----à    educationcome41

                                9

                                r=3

   14)   r=printf(“%d :%d”,printf(“\n %d”,printf(“come”),printf(“micro%s”,”soft”)));

printf(“\n r=%d”,r);

Output -------à microsoftcome

                                42: (20)à garbage value

                                r=4

   15)   r=65+ printf(“wel\n %s”,”Frndzone”,printf(“%d”,printf(“Education”)));

printf(“\n %d:%c”,r,r);

Output--------à Education9wel

                                Frndzone

                                73:I

   16)   r=32+printf(“%c”,65+printf(“come%s”,”Frndzone”),printf(“\n%d”,99-printf(“bho%s%c”,”pa”,’r’)));

printf(“\nr=%d”,r);

Output--------à Bhopal

                                93comeFrndzoneI

                                r=33

   17)   ‘A’+printf(“Wel%d”,printf(“come%s”,”Frndzone”,printf(“Computer\n %c,%d”,65,’D’)));

printf(“\n r=%d”,r);

Output-------à Computer

                                A,68comeFrndzonewel8

                                r=69

   18)   r=’2’+printf(“%d %c”,printf(“Wel%s”,”come”),65+printf(“Frndzone”,printf(“Education\n”)));

printf(“\n r= %d”,r);

Output-------à Education

                                FrndzoneWelcome7E

                                r=52

Some Questions  on scanf()

    1)      Write a program to accept an integer number from keyboard and display it same on monitor.

                void main()

{

                int a;

                clrscr();

                printf(“Enter a number:”);

                scanf(“%d”&a);

                printf(“Value of a=%d”,a);

getch();

}

Output------à Enter a number: 20

                                Value of a=20

    2)      Write a program to accept two integer number from keyboard and display it same on monitor.

                void main()

{

                int a,b;

                clrscr();

                printf(“Enter two number:”);

                scanf(“%d %d”,&a,&b);

                printf(“Value of a=%d,Value of b=%d”,a,b);

                getch();

}

Output------à Enter two number: 10 20

                                Value of a=10,Value of b=20

NOTE:- When no any separator is used in scanf() then two values must be separated by space or enter key.

Example:-

                void main()

{

                int a,b;

                clrscr();

                printf(“Enter two numbers:”);

                scanf(“%d @ %d “&a,&b);

                printf(“a=%d,b=%d”,a,b);

                getch();

}

Output-------àEnter two numbers: 10 @ 20

                                a=10,b=20