C++ print& prime pro

Program to enter a string and find its length

#include 

#include 

#include 

void main()

{

clrscr();

int slength;

char x[81];

cout << "Enter the string : " << endl;

cin>>x;

slength=strlen(x);

cout << "The length of the string " << x << " is " << slength << "." << endl;

getch();

}

Output

       The length of the string goldfish is 8.

Program to enter an integer and print if it is prime or composite

#include 

#include 

#include 

void main()

{

clrscr();

int num1,x;

cout << "Enter an integer : " << endl;

cin>>num1;

for(x=2;x

{

if(num1%x==0)

{

cout << num1 << " is a composite number." << endl;

getch();

exit(0);

}

else

{

cout << num1 << " is a prime number." << endl;

getch();

exit(0);

     }

   }

}

Output

23 is a prime number.

Program to enter the principal, rate & time and print the simple interest

#include 

#include 

void main()

{

clrscr();

int x;

float sinterest,principal,rate,time;

for(x=4;x>=0;x--)

{

cout << "Enter the principal, rate & time : " << endl;

cin>>principal>>rate>>time;

sinterest=(principal*rate*time)/100;

cout << "Principal = $" << principal << endl;

cout << "Rate = " << rate << "%" << endl;

cout << "Time = " << time << " years" << endl;

cout << "Simple Interest = $" << sinterest << endl;

}

getch();

}

Output

Principal = $1000

Rate = 5%

Time = 3 years

Simple Interest = $150

Program to switch between different cases

#include 

#include 

int main()

{

clrscr();

int choice;

cout << "1. Talk" << endl;

cout << "2. Eat" << endl;

cout << "3. Play" << endl;

cout << "4. Sleep" << endl;

cout << "Enter your choice : " << endl;

cin>>choice;

switch(choice)

{

case 1 : cout << "You chose to talk...talking too much is a bad habit." << endl;

break;

case 2 : cout << "You chose to eat...eating healthy foodstuff is good." << endl;

break;

case 3 : cout << "You chose to play...playing too much everyday is bad." << endl;

break;

case 4 : cout << "You chose to sleep...sleeping enough is a good habit." << endl;

break;

default : cout << "You did not choose anything...so exit this program." << endl;

}

getch();

}

Output

You chose to play...playing too much everyday is bad.