Chapter # 5, Loop Control Structure
Lab Activities

Q7. A class of 20 students takes an examination in which marks range from 1 to 100. Write a program to print the number of students passed and failed. Passing marks are 33.

 

Program:

#include<stdio.h>

#include<conio.h>

int main(int)

{

int n, m, pcount=0, fcount=0;

printf(“\nEnter marks of 20 students: “);

for(n=1; n<=20; n++)

{

printf(“\nstudents%d=”,m);

scanf(“%d”, &sum);

if(m>=33)

pcount=pcount + 1;

else

fcount =fcount +1;

}

printf(“\nNumber of passed students%d”, pcount);

printf(“\nNumber of fail students%d”, fcount);

getch();

}

 

Q8. Write a program that prints a line of 60 asterisks (*) using do while loop.

Program:

#include<stdio.h>

#include<conio.h>

int main(int)

{

int n;

n=1

do

{

printf(“_*”);

n=n+1;

for(n=1; n<=20; n++)

{

While(n<=60);

getch();

}

Output: ***************************************

 

Q9. Write a program that print table of squares of all the numbers from 1 to 10 as shown below.

Number               Square

1                                     1

2                                     4

3                                     9

4                                     16

5                                     25

6                                     36

7                                     49

8                                     64

9                                     81

10                                  100

Program:

#include<stdio.h>

#include<conio.h>

int main(int)

{

int n; square = 1;

for(n=1; n<=10; n++)

{

Sq=n*n;

printf(“Number\tSquare);

printf(“\n%d\t%d, n, Sq”);

}

getch();

}