Hi i am a beginner and i have to make a simple phonebook programme in C using library . I would definitely use but im not allowed to as it is for an assignment. Below is my code until now and i have 3 errors which i don't know how to solve. I know conversion from char to const char* is not allowed but i really need to compare these two type c arrays and i can't figure it out how to. I am using strcmp and i am using '\0' as a char which seem correct.

#include <iostream>

#include <cstring>

using namespace std;

struct contact {
char name[30];
char surname[30];
char phone_number[30];
};
int main() {


            for (int i = 0; i < 30; i  )
            {
                if (strcmp(person.name[i],person.surname[i]) != '\0')   <--- //ERROR HERE
                    cout << person.name[i] << person.surname[i] << person.phone_number[i];
                check  ;
            }
           
            char temp;
            char temp1;
            cout << "Insert the name of the contact to delete: \n";
            cin >> temp;
            cout << "Insert the surname of the contact to delete: \n";
            cin >> temp1;
            int check = 0;
            for (int i = 0; i < 30; i  )
            {
                if (strcmp(temp,person.name[i]) == 0 && strcmp(temp1, person.surname[i]) == 0)
                {   ^-- // 2 ERRORS HERE CONVERSION FROM 'CHAR' TO 'CONST CHAR*'
                    cout << "Contact deleted!\n";
                    person.name[i] = '\0';
                    person.surname[i] =  '\0';
                    person.phone_number[i] = '\0';
                    check  ;
                }
                if (check == 0)
                {
                    cout << "This person is not in your contact list\n ";
                 
            return 0;
    }


    

CodePudding user response：

maybe you don't understand struct well, here is a sample I have revised, you can take it for reference

#include <iostream>
#include <stdio.h>

using namespace std;

struct person{
    char name[30];
    char surname[30];
    char phone_number[30];
};

int main()
{
    person Persons[] = { // structure initialization
        {"Bob","Thug Bob","01230123"},
        {"Marry","Gangster Marry","9999999"},
        {"Somebody","Mr Somebody","777777"}
    };

    int Size = sizeof(Persons)/sizeof(Persons[0]); // return size of Persons array

    for(int i=0;i<Size;i  ){
        cout << Persons[i].name << "\t"<< Persons[i].surname << "\t"<< Persons[i].phone_number <<endl;
    }

    return 0;
}

CodePudding user response：

temp and temp1 are chars. strcmp expects const char*.

I'd suggest using std::string for C , it is a wrapper over char* and has more convenience methods to work with.

CodePudding user response：

I will just start from scratch as this code is really inconvenient. I am sorry for making a unnecessary question.