I/O Statements in C Programming

Input: scanf (“format char”, the address of variable)

Output: printf (“format char”, variable);

Format char

%d - int (decimal system)

%f - float

%c – Char

Assigning Variable

int x=25;

printf (“%d”, x);              /* o/p obtained = 25. */

(or)

printf(“x=%d”, x);           /* x=25 o/p */

printf (“%d is the value of x”, x); /* 25 is the value of x */

int x=10, y=40;

printf (“%d %d”, x, y);    /* 10 40 - o/p */

(or)

printf(“x=%d, y=%d”, x, y); /* x=10, y=40 */

printf (“Hello”);               /* o/p: Hello */

 

int x, y;

scanf(“%d”,2000) /* Here 2000 is the address of x */

                          /* The address of x is represented as &x */

scanf(“%d”, &x);

scanf(%d %d”, &x, &y);

Read two integers a and b, find the scan and print the sum

# include

void main ()

{

int a,b;

scanf(“%d%d”, &a,&b);

printf(“sum=%d”, a+b);

}                   /* sum = a + b (a,b were given at run time)*/