3 Amazing and Simple C ++ Programs for Beginners

3 Amazing and Simple C ++ Programs for Beginners

     - IDE Used: - CodeBlocks

     - IDE = Integrated development environment

     - // = single line comments

1]  Program to swap letters of a word: -

techeeINDIA

#include<iostream>
using namespace std;
void secret(char str[])
{int L,C;;
    for ( L=0;str[L]!='\0';L++);
    for ( C=0;C<L/2;C++)
        if(str[C]=='A'|| str[C]=='E')
        str[C]=str[L-C-1];
    else
    {
        char temp =str[C];
        str[C]=str[L-C-1];
        str[L-C-1]=temp;
    }
}
int main()
{
     char message[]="PreboardExam";
     secret(message);
     cout<<message<<endl;
     return 0;
}

OUTPUT: -

techeeINDIA

Also check: - C++ Program to calculate interest amount using function overloading with output

2] Program to input characters and change their case(From uppercase to lowercase or vice versa)

upper case = capital letter (  M,T,K,U)

Lower case = small letter (m,t,k,u)

techeeINDIA

#include<iostream>

#include<stdio.h>

using namespace std;

int main()

{

    char ch;

    do

    {

        cout<<"\nenter a character : ";

        ch=getchar();                                              //input character

        if(ch=='\n')

            ch=getchar();

        cout<<endl;

        if(ch>=65&&ch<=90)                               //if uppercase

            ch=ch+32;                                             //converted to lowercase

        else

            if(ch>=97&&ch<=122)                       //if lowercase

            ch=ch-32;                                            //converted to uppercase

        putchar(ch);

        cout<<endl;

    }while(ch!='0');

    return 0;

}

OUTPUT: -

techeeINDIA

3] Program to read a string and print its length : -

techeeINDIA

#include<iostream>                                                          //for cin,cout,  <<,   >>

#include<stdio.h>                                                            //for gets() and puts()

#include<string.h>                                                          //for strlen()

using namespace std;

int main()

{

    char astr[51];

    int length ;

    cout<<"\nenter a string(max 50 characters) : ";

    gets(astr);

    length=strlen(astr);

    puts(astr);

    cout<<"\nthe length of the string is : "<<length;

    return 0;

}

Output : -

techeeINDIA

                                                                                    - JAI HIND

3 Amazing and Simple C ++ Programs for Beginners