How to sort alphabetically in c++ programming - c++

Question

I'm trying to sort alphabetically by team for my program, but not having any luck. If there is any hints or advice out there I would appreciate it. Below is the program I have minus the data input. Basically I just want to know how I would go about specifically sorting only by team in alphabetical order.
nflrecievers data[100];
ifstream fin;
fin.open("data.txt");
ofstream fout;
fout.open("validationReport.txt");
int i = 0;
while(!fin.eof())
{
fin >> data[i].fname >> data[i].lname >> data[i].team >> data[i].rec >> data[i].yards >> data[i].avgyrds_percatch >> data[i].tds >> data[i].longest_rec >> data[i].recpasttwenty_yrds >> data[i].yrds_pergame >> data[i].fumbles >> data[i].yac >> data[i].first_dwns ;
i = i + 1;
}
int a;
int b;
cout << " Select NFL Receivers Statistics. Input 1-4 " << endl;
cout << " 1) Receivers with 25+ Rec and 300+ Yards. " << endl;
cout << " 2) Recievers with 3+ TDs and 3+ Rec over 20 Yards. " << endl;
cout << " 3) Recievers with 100+ Yards per game and 15+ First Downs. " << endl;
cout << " 4) Veiw Total Recievers Statistics. " << endl;
cin >> a;
int c = 0;
if (a==1)
{
cout << " Receivers with 25+ Rec and 300+ Yards. " << endl;
while( c < i-1)
{
if(data[c].rec > 25 && data[c].yards > 300)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " Rec: " << data[c].rec << " Yards: " << data[c].yards << endl;
cout << endl;
}
c++;
}
}
else if(a==2)
{
cout << " Recievers with 3+ TDs and 3+ Receptions past 20 Yards. " << endl;
while( c < i-1)
{
if(data[c].tds > 3 && data[c].recpasttwenty_yrds > 3)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " TDs: " << data[c].tds << " Receptions past 20 Yards: " << data[c].recpasttwenty_yrds << endl;
cout << endl;
}
c++;
}
}
else if(a==3)
{
cout << " Recievers who average over 100+ yards per game and 15+ First Downs. " << endl;
while( c < i-1)
{
if(data[c].yrds_pergame > 100 && data[c].first_dwns > 15)
{
cout << endl;
cout << data[c].fname << " " << data[c].lname << " " << data[c].team << endl;
cout << " Average Yards per game: " << data[c].yrds_pergame << " First Downs: " << data[c].first_dwns << endl;
cout << endl;
}
c++;
}
}
else if(a==4)
{
cout << " Select a Reciever: " << endl;
while( c < i-1)
{
cout << c << ") " << data[c].fname << " " << data[c].lname << endl;
c++;
}
cout << " Total NFL Receivers Statistics. " << endl;
cin >> b;
cout << data[b].fname << " " << data[b].lname << endl;
cout << " Team: " << data[b].team << endl;
cout << " Receptions: " << data[b].rec << endl;
cout << " Yards: " << data[b].yards << endl;
cout << " Average Yards Per Catch: " << data[b].avgyrds_percatch << endl;
cout << " Longest Reception: " << data[b].longest_rec << endl;
cout << " Receptions over 20 Yards: " << data[b].recpasttwenty_yrds << endl;
cout << " Yards per game " << data[b].yrds_pergame << endl;
cout << " Fumbles: " << data[b].fumbles << endl;
cout << " Average Yards After Catch " << data[b].yac << endl;
cout << " Total First Downs: " << data[b].first_dwns << endl;
}
return 0;
}

Answer 1

std::sort(std::begin(data), std::end(data),
[](const nflrecievers& a, const nflrecievers& b) { return a.team < b.team; });

Answer 2

I would use std::sort
bool compare_teams(const nflrecievers &a, const nflrecievers &b) {
return a.team < b.team;
}
int i = 0;
while(!fin.eof())
{
fin >> data[i].fname >> data[i].lname >> data[i].team >> data[i].rec >> data[i].yards >> data[i].avgyrds_percatch >> data[i].tds >> data[i].longest_rec >> data[i].recpasttwenty_yrds >> data[i].yrds_pergame >> data[i].fumbles >> data[i].yac >> data[i].first_dwns ;
i = i + 1;
}
std::sort(data, data+i, compare_teams);

Answer 3

for (int i=0;i<c-1;i++)
for (int j=0;j<c-1;j++)
if (data[j].team>data[j+1].team)
{
nflrecievers temp = data[j];
data[j] = data[j+1];
data[j+1] = temp;
}
another solution:
int compare(const void *v1, const void *v2)
{
nflrecievers p1 = *(nflrecievers *)v1, p2 = *(nflrecievers *)v2;
return strcmp(p1.team,p2.team);
}
qsort(data,c,sizeof(data),compare);