CBSE Guess > Papers > Important Questions > Class XII > 2010 > Computer Science > Computer Science By Ravi Kiran
CBSE CLASS XII
2003 Annual Paper
Q.1.a. What is the difference between global variables and local variables? Give an example to illustrate the same.
Ans:
The local variables are the variables
defined within any function (or block) and are
hence accessible only within the block in
which they are declared. In contrast to local
variables, variables declared outside of all the
functions in a program are called global
variables. These variables are defined outside
of any function, so they are accessible to all
functions. These functions perform various operations on the data. They are also known as External Variables.
Eg: #include<iostream.h>
int a,b;
void main()
{ float f;
---;
---;
}
In the above program segment, a and b are
global variables, we can access a and b from
any function. f is local variable to function
main( ), we can access f from main( ) only.
Q.1.b. Name the header file, to which the following built-in function belongs. (i) strcmp( ) (ii)getc( ) .
Ans:
(i) strcmp( ) - string.h
(ii)getc( ) - stdio.h
Q.1.c.
Rewrite the following program after
removing all the syntax error(s) if any.
#include<iostream.h>
void main( )
{ int P[ ]={90,10,24,15};Q,Number=4;
Q=9;
for[int I=Number-1;I>=0,I--]
switch(I)
{ case 0;
case 3:cout>>P[I]*Q<<endl;break;
case 1:
case 2: cout<<P[I]+Q;
}
}
Ans:
#include<iostream.h>
void main( )
{ int P[ ]={90,10,24,15},Q,Number=4;
Q=9;
for(int I=Number-1;I>=0;I--)
switch(I)
{ case 0:
case 3:cout<<P[I]*Q<<endl; break;
case 1:
case 2: cout<<P[I]+Q;
}
}
Paper By Mr. Ravi Kiran
Email Id : [email protected]
