whats the best way to set the value of an array field of a structure pointer in C? is it really like the following? T arr = { ... }; // size n memcpy(mystruct->arrfield, arr, n);

You need to wrap memcpy() in function to check some things: 1) you've allocated memory for struct->arr 2) you've put the correct size (n) to memcpy

afaik you can directly assigned struck valule when declaring it if both have same type. like T mystruct = arr; cmiiw

in my usecase theyre not the same type. thus giving me an the following: error: assignment to expression with array type

it works with memcpy but i find it ugly

If you want to do so, you need to pass the reference to the pointer

Hello Can anyone please help me with a "YES or NO " have I did the code well for this equation? 👉y=cos(45⁰)+log10(2x+1)+sin(45⁰) __________________________________ #include <iostream> #include <math.h> using namespace std; int main() { const double pi = 3.14159265; const unsigned short int kendi = 45; double y1, y2, y3, x; y1=cos(kendi*(pi/180)); y2=log10(2*x+1); y3=sin(kendi*(pi/180)); cout <<"cos(45): "<< y1 <<"\nlog10(2x+1): "<< y2 <<"\nsin(45): "<< y3 <<"\n\ny= " << y1+y2+y3 << endl; return 0; }

Yes Looks correct to me

You cant copy the array directly. But you can make one array to point on another. But it isn't copy

so did you mean like this? icosah->faces = &faces

typedef struct _float3 { float x; float y; float z; } float3; typedef struct _tri { float3 A; float3 B; float3 C; } typedef struct _icosa { tri faces[20]; ... } icosa; ... // later in main tri faces[] = { (tri) { ... }, ... (tri) { ... } }; icosa *icosahedron = (icosa *) calloc(1, sizeof(icosa)); // check if not null icosahedron->faces = faces; // gives above error memcpy(icosahedron->faces, faces, 20); // works

Sorry. I've disoriented you. You can use reference in some other cases...Just use memcpy() or for loop :)

Default constructors have no parameters. But does defining the body of a default constructor make it a custom one?

No, you just make it non-trivial (before C ++ 17), you could make it custom by changing the function signature.

hi I have a c++ lab exam tomorrow can anyone help me thanks

Thanks, you taught me something new today👍

By helping you mean help you to cheat?

Hey Danya, long time wasn't here, Can I ask an irrelevant question? (2 actually because of that one LOL) Is it ok to ask where can I find a professional computer's language coders that wants to create stuff and if it will succeed they will be paid for it? TY and sorry on advance if it's not a cool question

I try to use this👇🏻,but I only get a semicircle #include <stdio.h> #include <stdlib.h> int main() { float x,y; for(y=0.5;y>=-0.5;y-=0.05){ for(x=-0.5;x<=0.5;x+=0.05){ if(x*x+y*y-0.5*0.5<=0){ printf("*"); } }printf("\n"); } return 0; }

#include<iostream> using namespace std; class Emp { private: int ID; string Name; string Address; int Phone; public: void setInfo() { cout<<"\nEnter data\n"; cout<<"\nEnter the id: "; cin>>ID; cout<<"\nEnter the name: "; cin>>Name; cout<<"\nEnter the Address: "; cin>>Address; cout<<"\nEnter the phone: "; cin>>Phone; } void getInfo() { cout<<"\n The id: "<< ID <<"\n"; cout<<"\n The name: "<< Name <<"\n"; cout<<"\n The address: "<< Address <<"\n"; cout<<"\n The phone: "<< Phone <<"\n"; } }; class EMP_SAL: public Emp { private: double Salary; public: void setSal() { cout<<"\nEnter the salary: "; cin>>Salary; } void getSal() { cout<<"\n The salary: "<< Salary ; } }; class EMP_hours: public Emp { private: int NO_of_hours; double cost_hours; public: void setInfohou() { cout<<"\nEnter the number of job's hours: "; cin>>NO_of_hours; cout<<"\nThe cost of hour: "; cin>>cost_hours; } void getinfohou() { cout<<"\n The number of job's hours: "<<NO_of_hours<<"\n"; } void get_amount() { cout<<"\n The mount is: "<<(NO_of_hours*cost_hours); } }; int main() { EMP_SAL e; EMP_hours h; e.setInfo(); e.setSal(); cout<<"-------------------------"<<endl; cout<<"Display Data"<<endl; e.getInfo(); e.getSal();cout<<"$"; cout<<"\n\n&&&&&&&&&&&&&&&&&&&&&&&&&"<<endl; h.setInfo(); h.setInfohou(); cout<<"-------------------------"<<endl; cout<<"Display Data"<<endl; h.getInfo(); h.getinfohou(); h.get_amount(); cout<<"$"; cout<<"\n\n&&&&&&&&&&&&&&&&&&&&&&&"<<endl;

Plz help

Is there any way i can run music file in c++ i mean open and play. kindly guide me

Is there any way i can run music file in c++ i mean open and play. kindly guide me

google.com

Hi, I have a question and I have to get the answer. Can anyone help me؟