Assignment 3: Library Function SOLUTION

Library Function

1	Write a program which input principal, rate and time from user and calculate compound interest. You can use library function. CI = P(1+R/100)T - P  #include<iostream.h> #include<conio.h> #include<math.h> int main() { float P,R,T,CI; cout<<"Enter Principal, Rate and Time : "; cin>>P>>R>>T; CI=P*pow((1+R/100),T) - P; cout<<"Compound Interest is : "<<CI; getch(); return 0; }
2	Write a program to compute area of triangle. Sides are input by user. Area = sqrt(s*(s-a)*(s-b)*(s-c))  where s=(a+b+c)/2.  #include<iostream.h> #include<conio.h> #include<math.h> int main() { float a,b,c,s,Area; cout<<"Enter three sides of triangle : "; cin>>a>>b>>c; s=(a+b+c)/2; Area=sqrt(s*(s-a)*(s-b)*(s-c)); cout<<"Area of triangle is : "<<Area; getch(); return 0; }
3	Write a program to check character entered is alphabet, digit or special character using library functions.  #include<iostream.h> #include<conio.h> #include<ctype.h> #include<stdio.h> int main() { char ch; cout<<"Enter any character :"; ch=getchar(); if(isalpha(ch)) cout<<"Alphabet"; else if(isdigit(ch)) cout<<"Number"; else cout<<"Special Character"; getch(); return 0; }
4	Write a program which display a number between 10 to 100 randomly. #include<iostream.h> #include<conio.h> #include<stdlib.h> int main() { int n; randomize(); n=random(91)+10; cout<<"The randomly selected number is :"<<n; getch(); return 0; }
5	Write a program which accept a letter and display it in uppercase letter. #include<iostream.h> #include<conio.h> #include<stdio.h> #include<ctype.h> int main() { char ch; cout<<"Enter any character :"; ch=getchar(); ch=toupper(ch); cout<<ch; getch(); return 0; }
6	Write a C++ program to implement the Number Guessing Game. In this game the computer chooses a random number between 1 and 100, and the player tries to guess the number in as few attempts as possible. Each time the player enters a guess, the computer tells him whether the guess is too high, too low, or right. Once the player guesses the number, the game is over.  #include <iostream> #include <cstdlib> #include <ctime> using namespace std; int main() { int num, guess, tries = 0; srand(time(0)); //seed random number generator num = rand() % 100 + 1; // random number between 1 and 100 cout << "Guess My Number Game\n\n"; do { cout << "Enter a guess between 1 and 100 : "; cin >> guess; tries++; if (guess > num) cout << "Too high!\n\n"; else if (guess < num) cout << "Too low!\n\n"; else cout << "\nCorrect! You got it in " << tries << " guesses!\n"; } while (guess != num); cin.ignore(); cin.get(); return 0; }