Page 103 - Modular_V2.0_C++_Flikpbook
P. 103
MORE SOLVED PROGRAMS
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Program 4: To calculate the value of E = mc using functions, if m = 100 kg and c = 2 m/s.
#include<iostream.h>
DOSBox 0.74, Cpu speed: max 100% cycles, Frameskip 0, Program:
#include<math.h>
Mass (m) = 100 kg
#include<conio.h>
Speed of Light (c) = 2 m/s
void main() Energy (E = mc^2) = 400 Joules
{
double energy, mass = 100, lightspeed = 2;
clrscr();
cout<< "Mass (m) = " << mass << " kg";
cout<< "\nSpeed of Light (c) = " << lightspeed << " m/s";
energy = mass * pow(lightspeed, 2);
cout<< "\nEnergy (E = mc^2) = " << energy << " Joules";
getch();
}
Program 5: To take a character as input and check whether it is an uppercase letter. If it is an
uppercase letter, then change it into lowercase.
#include<iostream.h>
#include<ctype.h>
#include<conio.h>
void main() DOSBox 0.74, Cpu speed: max 100% cycles, Frameskip 0, Program:
{ Enter a character: R
char ch; Character in lowercase: r
_
clrscr();
cout<< "Enter a character: ";
cin>> ch;
if(isupper(ch))
{
cout<< "Character in lowercase: " << (char)tolower(ch) << endl;
}
else
{
cout<< "Character is not an uppercase letter." << endl;
} DOSBox 0.74, Cpu speed: max 100% cycles, Frameskip 0, Program:
getch(); Enter a character: t
Character is not an uppercase letter.
}
_
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Header Files and Library Functions

