Write an algorithm and draw a corresponding flowchart to print the sum of all integers starting from 2 to the given positive integer x where x >= 2. 10m Dec2006

Write an algorithm and draw a corresponding flowchart to print the sum of all integers starting from 2 to the given positive integer x where x >= 2. 10m Dec2006

An algorithm is a finite set of steps defining the solution of a particular problem. An algorithm is expressed in pseudo code – something resembling C language or Pascal, but with some statements in English rather than within the programming language

1. A sequential solution of any program that written in human language, called algorithm.
2. Algorithm is first step of the solution process, after the analysis of problem, programmers write the algorithm of that problem.

Pseudo code: 

• Initialize I to zero , Sum to zero
• Input a Number
• While I is Less than equal to Number
•         itoa(I,SNUM,10)
•               If SNUM[0] equal to ‘2’
•                           SUM=SUM+I
•                Increment I
•         Print SUM
• Stop

Detailed Algorithm:

Step 1:  Input NUM

Step 2:  I = 0 , SUM =0

Step 3:  While ( I<= NUM)

itoa(I,SNUM,10)

If ( SSNUM[0] == ‘2’)[I] == S[J] )

SUM=SUM+I

I++

Step 6:    Print SUM

Step 7: End

Program Code:

[codesyntax lang=”c”]

c#include<stdio.h>
#include<stdlib.h>
void main()
{
int SUM=0,NUM,i;
char SNUM[5];
clrscr();
printf("\nENTER ANY INTERGER >= 2 : ");
scanf("%d",&NUM);
for(i=0;i<=NUM;i++)
{
itoa(i,SNUM,10);
if(SNUM[0]=='2')
SUM=SUM+i;
}
printf("\n%d",SUM);
getch();
}

[/codesyntax]

Flowchart:-