Include iostream include cctype include cstring using

#include <iostream>
#include <cctype>
#include <cstring>
using namespace std;
int main(void)
{
int count[26] = {0};
char sentence[81];
int i, len, index;
cout << "Enter a sentence: ";
cin.getline(sentence, 81);
len = strlen(sentence);
for (i=0; i<len; i++)
{
if (isalpha(sentence[i]))
{
index = tolower(sentence[i]) - 97;
count[index]++;
}
}
cout << "The count for each letter is:\n";
for (i=0; i<26; i++)
cout << (char)(i+97) << "\t" << count[i] << endl;
return 0;
}
13.
#include <iostream>
6

UECS1643 Fundamentals Of Programming
#include <iomanip>
using namespace std;
struct POINT
{
double x_coord ;
double y_coord;
};
int main(void)
{
struct POINT p1, p2, midpoint;
cout << "Enter coordinates for p1: ";
cin >> p1.x_coord >> p1.y_coord;
cout << "Enter coordinates for p2: ";
cin >> p2.x_coord >> p2.y_coord;
midpoint.x_coord = (p1.x_coord + p2.x_coord) / 2;
midpoint.y_coord = (p1.y_coord + p2.y_coord) / 2;
cout << "The midpoint of p1 and p2: (" << fixed << setprecision(1)
<< midpoint.x_coord << ", " << midpoint.y_coord << ")\n";
return 0;
}
14.
#include <iostream>
#include <iomanip>
using namespace std;
struct TIME
{
int hour;
int minute;
};
int main()
{
struct TIME time;
cout << "Enter current time hours and minutes:";
cin >> time.hour >> time.minute;
time.minute ++;
if (time.minute == 60)
{
time.minute -= 60;
time.hour++;
if (time.hour > 12)
time.hour -= 12;
}
cout << "\nThe time one minute later: " << setfill('0')
<< setw(2) << time.hour << ":" << setw(2) << time.minute << endl;
return 0;
}
15.
#include <iostream>
7

UECS1643 Fundamentals Of Programming
using namespace std;
typedef struct
{
int numerator;
int denominator;
} FRACTION;
FRACTION get_fraction (void);
void print_fraction (FRACTION f);
FRACTION reduce (FRACTION f);
int main(void)
{