https://pastebin.com/wJq302Gd

Is there a difference between char a[n][m] & char a[][m]? Also why it is not printing garbage when I provide m > my column values like in the second case? Any specific reason? Here 👇 https://pastebin.com/wJq302Gd

a[][m] (the empty size on the front will be filled with exactly how many members you initialize the array). a[n][m] you explicitly mention the size. —————————— The first one prints garbage because you don't have NUL terminated C string, so it will prints everything beyond the array until it finds a NUL char. However the second one, you have a NUL char by implicitly gives a[][6]. See the size 6, if you initialize 5 of it, the rest will be initialized with zero (it's a NUL char). So, another example: char my_str[3] = {'a', 'b', 'c'}; my_str[3] will be unspecified, can be a garbage. But char my_str[100] = {'a', 'b', 'c'}; my_str[3] to my_str[99] will be zero. Conclusion: If you initialize an array partially, the rest will be initialized with zero.

a[][m] (the empty size on the front will be filled with exactly how many members you initialize the array). a[n][m] you explicitly mention the size. —————————— The first one prints garbage because you don't have NUL terminated C string, so it will prints everything beyond the array until it finds a NUL char. However the second one, you have a NUL char by implicitly gives a[][6]. See the size 6, if you initialize 5 of it, the rest will be initialized with zero (it's a NUL char). So, another example: char my_str[3] = {'a', 'b', 'c'}; my_str[3] will be unspecified, can be a garbage. But char my_str[100] = {'a', 'b', 'c'}; my_str[3] to my_str[99] will be zero. Conclusion: If you initialize an array partially, the rest will be initialized with zero.

i am just curious.. like how to implement such bots on telegram??

https://core.telegram.org/bots/api

'Write a program to validate a given date and find the next date.' For the above question, is there no better approach than using multiple if-else statements?

'Write a program to validate a given date and find the next date.' For the above question, is there no better approach than using multiple if-else statements?

Multiple if else is fine I think

yeah but its too lengthy

#REGEX 3 alpha + 3 number must = totally 6 How to validate ?

You can put it into a function to check one day/month/year combination.

'Write a program to validate a given date and find the next date.' For the above question, is there no better approach than using multiple if-else statements?

i think at some point you will use if statements, e.g to check if month input <= 12

should it be in the specific order like, abc123 ?

Is it C or C++? Are you allowed to use standard libraries?

ask the op.

i think at some point you will use if statements, e.g to check if month input <= 12

not some but all, like u have to check if its a leap year then check if its February or those 30day months or 31 day moths then do the same for no leap years then print what's invalid, then also print the next date, again if the date's already the last date of month, I would have to use if-else statement to add a month so

Is it C or C++? Are you allowed to use standard libraries?

C and I'm not sure if we can use libraries but pls suggest some if u know

There's time.c, but I don't know the details of this library (not a C programmer).

not some but all, like u have to check if its a leap year then check if its February or those 30day months or 31 day moths then do the same for no leap years then print what's invalid, then also print the next date, again if the date's already the last date of month, I would have to use if-else statement to add a month so

What you can do not to check for each specific month is to have array of 12 elements, each element containing days of the month, then you will need only check for February and leap year

#include<iostream> using namespace std; class complex { float x,y; public: complex(); complex(float a){x=y=a;} complex(float real,float imag) {x=real;y=imag;} friend complex sum(complex,complex); friend void show(complex); }; complex sum(complex c1,complex c2) { complex c3; c3.x=c1.x+c2.x; c3.y=c1.y+c2.y; return(c3); } void show(complex c) { cout<<c.x<<"+"<<c.y<<"i\n"; } int main() { complex A(2.7,3.5); complex B(1.6); complex c; c=sum(A,B); cout<<"A=";show(A); cout<<"B=";show(B); cout<<"c=";show(c); return 0; }

[ERROR] ID 1 returned 1 exit status

#include<iostream> using namespace std; class complex { float x,y; public: complex(); complex(float a){x=y=a;} complex(float real,float imag) {x=real;y=imag;} friend complex sum(complex,complex); friend void show(complex); }; complex sum(complex c1,complex c2) { complex c3; c3.x=c1.x+c2.x; c3.y=c1.y+c2.y; return(c3); } void show(complex c) { cout<<c.x<<"+"<<c.y<<"i\n"; } int main() { complex A(2.7,3.5); complex B(1.6); complex c; c=sum(A,B); cout<<"A=";show(A); cout<<"B=";show(B); cout<<"c=";show(c); return 0; }

Anyone who can help with coding?

Seems like you forgot to implement your default constructor https://ideone.com/50jL0o

#include<iostream> using namespace std; class sample { int x; } int main() { sample obj; obj.x=100; cout<<"x="<<obj.x<<endl; }

Your x is private, either make it public explicitly, or replace class with struct (to make it public by default)

without changing the program,what output might i get? thanks

If we imagine that we live in a universe where this code is valid, and assuming that the differences with our current universe are not big enough, I would guess the output would be x=100

Please tell me what errors are there in this

Please tell me what errors are there in this

#include<iostream> int main() { int i=2500,j=3000; cout>>"i+j=">>(i+j)>>endl; return 0; }

- cout is located at namespace std. - Wrong bitwise operator direction. I suggest you before asking this trivial question, try to compile it yourself. I think your compiler is good enough to tell you what is wrong with this code.

#include<iostream> int main() { int i=2500,j=3000; std::cout<<"i+j="<<(i+j)<<std::endl; return 0; } You don't have a namespace so you need to use std::

thank you and do you know good free online compilers for c++??

godbolt.org is the best I found.

thank you and do you know good free online compilers for c++??

https://www.onlinegdb.com