#include <stdio.h>
#include <stdlib.h>
int main(int argc, char *argv[])
{
FILE *fp;
char str[128];
if((fp = fopen(argv[ 1 ], "r"))==NULL) {
printf("Cannot open file.\n");
exit(1);
}
while(!feof(fp)) {
if(fgets(str, 126, fp))
printf("%s", str);
}
fclose(fp);
return 0;
}
#include <iostream>
#include <map>
#include <functional>
#include <string>
using namespace std;
int main()
{
map<string, int, greater<string> > mapObject;
mapObject["A"] = 20;
mapObject["B"] = 19;
mapObject["C"] = 10;
map<string, int, greater<string> >::iterator p;
for(p = mapObject.begin(); p != mapObject.end(); p++) {
cout << p->first << " has value of ";
cout << p->second << endl;
}
return 0;
}
#include <iostream>
using std::cout;
using std::endl;
#include <set>
#include <algorithm>
#include <iterator> // ostream_iterator
int main()
{
double a[ 5 ] = { 2.1, 4.2, 9.5, 2.1, 3.7 };
std::set< double, std::less< double > > doubleSet( a, a + 5 );;
std::ostream_iterator< double > output( cout, " " );
cout << "doubleSet contains: ";
std::copy( doubleSet.begin(), doubleSet.end(), output );
cout << endl;
return 0;
}
/*
doubleSet contains: 2.1 3.7 4.2 9.5
*/
#include <iostream>
using namespace std;
int main()
{
cout.setf(ios::showpoint);
cout.setf(ios::showpos);
cout << 100.0;
return 0;
}
#include <iostream>
#include <cstring>
using namespace std;
class inventory {
char item[40]; // name of item
int onhand; // number on hand
double cost; // cost of item
public:
inventory(char *i, int o, double c)
{
strcpy(item, i);
onhand = o;
cost = c;
}
friend ostream &operator<<(ostream &stream, inventory ob);
friend istream &operator>>(istream &stream, inventory &ob);
};
ostream &operator<<(ostream &stream, inventory ob)
{
stream << ob.item << ": " << ob.onhand;
stream << " on hand at $" << ob.cost << ‘\n’;
return stream;
}
istream &operator>>(istream &stream, inventory &ob)
{
cout << "Enter item name: ";
stream >> ob.item;
cout << "Enter number on hand: ";
stream >> ob.onhand;
cout << "Enter cost: ";
stream >> ob.cost;
return stream;
}
int main()
{
inventory ob("hammer", 4, 12.55);
cout << ob;
cin >> ob;
cout << ob;
return 0;
}
