Formatted Input

—C provides scanf() function for entering input data

—Syntax

—scanf(“control string”, address1, address2….);

—

—Control string specifies the format in which data has to be entered

—

—address1, address2 specifies the address of locations where data is to be stored

Examples Integer Numbers

—Format: %wd

—w is the field width

—

—Ex 1

int marks;

scanf(“%d”,&marks);

—Ex 2

char str[30];

scanf(“%s”,str);    Value will not be stored in str

—Ex 3

int basic,da;

scanf(“%d%d”,&basic,&da);




Ex 4

int hra,da;

scanf(“%d:%d”,&hra,&da);     1500:200

—

—

—Ex 5

int num1,num2;

scanf(“%2d %5d”,&num1,num2);  21345 50

—

—

—21 will be assigned to num1 and 345 will be assigned to num2 and 50 that is unread will be assigned to next scanf call

—Ex 6

int a,b;

scanf(“%d %*d %d”, &a,&b);123 456 789

—123 to a

—456 skipped (because of *)

—789 to b

Examples Real Numbers

—Ex 1

float x;

scanf(“%f”,&x);

—

—Assigns: 4.321 to x

—

—Ex 2

double y;

scanf(“%lf”,&y);