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What will be the output of the following code?
#include <iostream>
#include <stack>
using namespace std;
#include <iostream>
#include <stack>
using namespace std;
int main() {
stack<int> myStack;
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.pop();
cout << myStack.size() << endl;
return 0;
}
stack<int> myStack;
myStack.push(10);
myStack.push(20);
myStack.push(30);
myStack.pop();
cout << myStack.size() << endl;
return 0;
}
- a)0
- b)1
- c)2
- d)3
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
What will be the output of the following code?#include <iostream>...
The code pushes the elements 10, 20, and 30 onto the stack. After popping an element, the size() function returns the number of elements remaining in the stack, which is 2.
Most Upvoted Answer
What will be the output of the following code?#include <iostream>...
Understanding the Code
The provided C++ code utilizes the standard library's stack container to manage a collection of integers. Here's a breakdown of the operations performed:
Stack Operations
- Initialization: A stack named `myStack` is created.
- Pushing Elements:
- `myStack.push(10);` - The integer 10 is added to the stack.
- `myStack.push(20);` - The integer 20 is added to the stack.
- `myStack.push(30);` - The integer 30 is added to the stack.
After these operations, the stack contains three elements: 10, 20, and 30.
Pop Operation
- Removing the Top Element:
- `myStack.pop();` - This operation removes the top element of the stack, which is 30. After this operation, the stack now contains the elements 10 and 20.
Calculating the Size
- Getting the Size:
- `cout < mystack.size()="" />< endl;`="" -="" this="" line="" prints="" the="" current="" size="" of="" the="" stack.="" since="" we="" removed="" one="" element="" (30),="" the="" stack="" now="" has="" two="" remaining="" elements="" (10="" and="" />
Conclusion
- The final output of `myStack.size()` is 2, as there are two elements left in the stack after the pop operation.
Thus, the correct answer is option 'C', which corresponds to the size of the stack being 2.
The provided C++ code utilizes the standard library's stack container to manage a collection of integers. Here's a breakdown of the operations performed:
Stack Operations
- Initialization: A stack named `myStack` is created.
- Pushing Elements:
- `myStack.push(10);` - The integer 10 is added to the stack.
- `myStack.push(20);` - The integer 20 is added to the stack.
- `myStack.push(30);` - The integer 30 is added to the stack.
After these operations, the stack contains three elements: 10, 20, and 30.
Pop Operation
- Removing the Top Element:
- `myStack.pop();` - This operation removes the top element of the stack, which is 30. After this operation, the stack now contains the elements 10 and 20.
Calculating the Size
- Getting the Size:
- `cout < mystack.size()="" />< endl;`="" -="" this="" line="" prints="" the="" current="" size="" of="" the="" stack.="" since="" we="" removed="" one="" element="" (30),="" the="" stack="" now="" has="" two="" remaining="" elements="" (10="" and="" />
Conclusion
- The final output of `myStack.size()` is 2, as there are two elements left in the stack after the pop operation.
Thus, the correct answer is option 'C', which corresponds to the size of the stack being 2.
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What will be the output of the following code?#include <iostream>#include <stack>using namespace std;int main() { stack<int> myStack; myStack.push(10); myStack.push(20); myStack.push(30); myStack.pop(); cout << myStack.size() << endl; return 0;}a)0b)1c)2d)3Correct answer is option 'C'. Can you explain this answer? for Software Development 2025 is part of Software Development preparation. The Question and answers have been prepared according to the Software Development exam syllabus. Information about What will be the output of the following code?#include <iostream>#include <stack>using namespace std;int main() { stack<int> myStack; myStack.push(10); myStack.push(20); myStack.push(30); myStack.pop(); cout << myStack.size() << endl; return 0;}a)0b)1c)2d)3Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for Software Development 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for What will be the output of the following code?#include <iostream>#include <stack>using namespace std;int main() { stack<int> myStack; myStack.push(10); myStack.push(20); myStack.push(30); myStack.pop(); cout << myStack.size() << endl; return 0;}a)0b)1c)2d)3Correct answer is option 'C'. Can you explain this answer?.
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