C lesson #2-part 2-Sum

i expect you have learned what i taught in previous class SO answer this

Q:what will be output when i have this replced in printf

printf("sum=%d",c);

Answer:: Think before you answer what i taught is %d replaces so output would be

sum=40

**************************************************************************************

Forward to todays's class now this aint a calculator indeed so if we want user to input we'll use another function

scanf which will scan what user entered and will take that to complete program//!

#include <stdio.h>

#include<conio.h>

void main()

{

int a,b,c;

clrscr();

C=a+b;

printf("enter first no.=");

scanf("%d", &a);

printf(2nd no.=");

scanf("%d", &;

printf("Sum=%d",C);

getch();

}

here in program scanf function is used to scan what user entered firstly program will print enter first no.=

than after that we will enter the no. and scanf function will detect what we have entered

you might be asking all fine that % would be repalced by a but why & is used?

Reason:its used to address something in program..!

now it will print 2nd no.= we will enter the no. and it will be replaced by B than it will print C that is mentioned above that c would be equal to a+b..

hence all fine i think..!

REvise practise

i'll be asking questions in next class..!