How in C++ can I arrange arrays of last names in alphabetical order?

Question

I need at least some explicit examples of how to arrange arrays that are stored in structures so that I can display de names starting with the last name, then the first name(previously introduced the last and first name on different arrays), but it will display in a way that, the series of last names with its proper first name being on a list in alphabetical order determined by the last name

Answer 1

In case you are using a class or structure to store the firstName & lastName,
you can use the following code to

#include
#include
class Name
{
public:
char firstName[20];
char lastName[20];
public:
Name(char first[20], char last[20])
{
strcpy(firstName,first);
strcpy(lastName,last);
}
Name(Name &name)
{
strcpy(firstName,name.firstName);
strcpy(lastName,name.lastName);
}
Name &operator=(Name &name)
{
strcpy(firstName,name.firstName);
strcpy(lastName,name.lastName);
return *this;
}
};

void sortByLastName(Name nameList[100], int count)
{
int index1, index2;
for(index1=0; index1 {
for(index2=index1+1; index2 {
if(strcmp(nameList[index1].lastName, nameList[index2].lastName)>0)
{
Name tempName = nameList[index1];
nameList[index1] = nameList[index2];
nameList[index2] = tempName;
}
}
}
}

void display(Name nameList[100], int count)
{
int index;
for(index=0; index {
cout << nameList[index].lastName << " " << nameList[index].firstName << endl;
}
}


In case you are using two arrays, containing the firstName & lastName,
you have to sort both the arrays together based on the lastName.

#include
#include

void sortByLastName(char firstName[][20], char lastName[][20], int count)
{
int index1, index2;
for(index1=0; index1 {
for(index2=index1+1; index2 {
if(strcmp(lastName[index1], lastName[index2])>0)
{
char tempName[20];

strcpy(tempName,lastName[index1]);
strcpy(lastName[index1],lastName[index2]);
strcpy(lastName[index2],tempName);

strcpy(tempName,firstName[index1]);
strcpy(firstName[index1],firstName[index2]);
strcpy(firstName[index2],tempName);

}
}
}
}

void display(char firstName[][20], char lastName[][20], int count)
{
int index;
for(index=0; index {
cout << lastName[index] << " " << firstName[index] << endl;
}
}

Answer 2

There is not enough information to give you any kind of answer. But the general answer is to just use a bubble sort. Do a search on it and you should find one pretty quick.