CBSE Computer Science - Revision Tour(Solved)

CBSE Guess > eBooks > Class XII > CBSE Computer Science C++ Solved Revision Tour By Mr. Ravi Kiran

COMPUTER SCIENCE C++

2000:

1.b) Name the header file, to which following built in function belong: (i) isupper() (ii) setw() (iii) exp() (iv) strcmp()

2

Ans)

(i) isupper( ) - ctype.h
(ii) setw( ) - iomanip.h
(iii) exp( ) - math.h
(iv) strcmp( ) - string.h

1.c) Will the following program execute successfully?If not, state the eason(s)

#include<stdio.h>
void main( )
{ int s1,s2,num;
s1=s2=0;
for(x=0;x<11;x++)
{ cin<<num;
if(num>0)s1+=num;else s2=/num;
}
cout<<s1<<s2;
}

2

Ans: The program will not execute successfully. Because some syntax errors are there in the program. They are
(i) cin and cout, stream objects used but iostream.h header file is not included in the program.
(ii) x is not declared, it should be declared as int.
(iii) With cin, we should use >> instead of <<. (iv)The shorthand operator /=, is given wrongly as =/.

So the corrected program is as follows:

#include<iostream.h>
void main( )
{ int s1,s2,num;
s1=s2=0;
for(int x=0;x<11;x++)
{ cin>>num;
if(num>0)s1+=num;else s2/=num;
}
cout<<s1<<s2;
}

d) Give the output of the following program segment(Assuming all required header files are included in the program):

char *NAME=”a ProFiLe”;
for(int x=0;x<strlen(NAME);x++)
if(islower(NAME[x]))
NAME[x]=toupper(NAME[x]);else if(isupper(NAME[x]))
if(x%2!=0)
NAME[x]=tolower(NAME[x-1]);
else
NAME[x]--;
cout<<NAME<<endl;

2

Ans: Output: AOROoIiE

CBSE Computer Science Solved Revision Tour By Mr. Ravi Kiran ( [email protected] )