Answer / vivek

Its a very simple answer if u r thinking as a software
engineer . so these mimi things are very importants .
variable not found means . in this program
U HAVE NOT DECLARED THE VARIABLE CALLED iSum . AND U R
TRYING TO ASSIGN THE i + j TO iSum VARIABLE WHICH WAS NOT
DECLARED THATS Y THE COMPILER GIVING AN ERROR .

Answer / yogambika

when u have not declared variable in the main function or
any other function but used in the program.
example:
main()
{
int i,j;----------------> (iSum not declared)
printf("enter the value of i and j");
scanf("%d%d",&i,&j);
iSum = i + j;
printf("The Sum =",iSum);
getch();
}
In this case iSum will Show a compiler error "Variable not
found".

Answer / deepti khanna

in some of the programming language it is not required to
declare a variable before we use, but in c++ while using a
variable prior to that we need to declare the variable
first.

main()
{
i=25;
cout<<i;
}
above program may show error because we doesn't declare a
variable.

quoroum of computer languages?

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