Question

Give the output for the following code assume int globalvar 10: above the function prototypes void foo(int&); void bar(int); int main() { int globalVar = 5; foo(globalVar); cout << globalVar << endl; bar(globalVar); cout << globalVar << endl; return 0; } void foo(int& x) { x = globalVar + x; cout << globalVar << endl; return; void bar(int x) { globalVar + x; cout << globalVar << endl; X = return;

Answer 1

Question:

Give the output of the following code:
#include <iostream>
using namespace std;

//Declared an globalVar intialised with
//value 10 above the function prototypes
int globalVar=10;
void foo(int&);
void bar(int);
int main()
{
int globalVar = 5;
foo(globalVar);
cout<<globalVar<<endl;
bar(globalVar);
cout<<globalVar<<endl;
return 0;
}
void foo(int& x)
{
x=globalVar+x;
cout<<globalVar<<endl;
return;
}
void bar(int x)
{
x=globalVar+x;
cout<<globalVar<<endl;
return;
}

The output of the following code is:
10
15
10
15

• All the execution starts from the main
• In the main, we have defined a variable named globalVar as 5, then we are calling the function foo() with the parameter globalVar()
• In the function foo(), we are incrementing the globalVar with the value of x(which is globalVar) as 10+5 ==> 15, and then we are printing the value of globalVar which is 10.
• In the main, we are printing the value of globalVar as 15
• Again, we are calling the function bar() with the parameter globalVar
• In the function bar(), we are again updating the value of x as globalVar with x ==> 10+5 as 15, and then we are printing the value of globalVar which is 10
• In the main, we are printing the value of globalVar as 15

Please check the compiled program and its output for your reference:

1 main.cpp #include <iostream> 2 using namespace std; 3 4 //Declared an globalVar intialised with 5 l/value 10 above the function prototypes 6 int globalVar=10; 7 8 void foo(int&); 9 void bar(int); 10 11 int main() 12 - { 13 int globalVar 5; 14 foo(globalVar); 15 cout<<globalVar<<endl; 16 bar(globalVar); 17 cout<<globalVar<<endl; 18 return @; 19} 20 21 void foo(int& x) 22 - { 23 x=globalVar+x; 24 cout<<globalVar<<endl; 25 return; 26 } 27 28 void bar(int x) 29 { 30 x=globalVar+x; 31 cout<<globalVar<<endl; 32 return; 33 } AwNo

Output:

input 10 15 10 15 ... Program finished with exit code o Press ENTER to exit console. I

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