Answer Posted / astha biswas

there are some key-words like class , new etc which can be
used as identifiers in c. so if we save program in .c using,
new as an identifier, it will not show any error; but if we
save the same program in .cpp, it will show error as new is
an operator in c++.

EX:

#include<stdio.h>
#include<conio.h>
void main()
{
int new;
clrscr();
new=3;
printf("%d",new);
}

if we execute this program in .c, output will be 3.
but if we execute this program in .cpp; then it will show 2
errors.
1. declaration terminated incorrectly.
2. lvalue required.

Write a program to interchange 2 variables without using the third one.

1037

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Does c++ support multilevel and multiple inheritances?

994

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How does class accomplish data hiding in c++?

1162

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Why is c++ not purely object oriented?

993

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What is this pointer in c++?

1377

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What is #include ctype h in c++?

1149

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What is the difference between prefix and postfix versions of operator++()?

1069

---

What is the meaning of string in c++?

1057

---

What are structures and unions?

991

---

What is srand c++?

1095

---

What are the two types of comments, and how do they differ?

1114

---

What is abstraction with real time example?

1139

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What is the most useful programming language?

1034

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Name the debugging methods that are used to solve problems?

1074

---

If I is an integer variable, which is faster ++i or i++?

1056

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