Write a C program to compute
the length of a string using functions.
#include<stdio.h>
void main()
{
int
n;
char
string[50];
printf("Enter the
String.:");
scanf("%[^\n]s",string);
/* call the function */
n = string_length(string);
printf("Length of
string = %d\n", n);
}
/* definition of local
function string_length */
int string_length (char
string[])
{
/* local variable in this function */
int n;
for(n=0;string[n]!='\0';n++);
return n;
}
Input: This is the
first tutorial on functions.
Output: 40
Assign. 7A:
Write a C program using functions to do
the following on a given string:
1.
Display the input
string in uppercase
2.
Compute the length
of the string(with spaces)
3.
Compute the length
of the string(without spaces)
4.
Compute the word
count of the string
Represent each as a different
function.
Note: If the
expression "%[^\n]s"
does
not work on your terminal then you can use “gets(<string variable>)”.
Input : This is the first assignment on functions
Output
Uppercase : This is the first assignment
on functions
Length(with spaces) : 41
Length(without spaces) : 35
Word
Count : 7
Tutorial 7B:
Recursion
Write a C program to compute
the value of a given integer raised to a given positive power using a recursive
function.
#include<stdio.h>
void main()
{
int a,b,c;
printf("\n Enter the numbers :");
scanf("%d %d" ,&a,&b);
if(b<0)
{
printf("Sorry only positive powers are allowed.");
exit(0);
}
c=power(a,b);
//A Function Call//
printf("\n The value of %d raised to the power %d is %d",a,b,c);
}
int power(int a,int b)
{
int result=1;
if(b==0)
return result;
else
{
result=a*power(a,--b);
}
return result;
}
|
INPUT a=-5,b=-8 |
OUTPUT Invalid |
|
a=2,b=8 |
256 |
|
a=-3,b=3 |
-27 |
Assignment 7B:
Write a C program to find
the factorial of a positive integer using both non-recursive & recursive
functions.
|
INPUT 4 |
OUTPUT 24 |
|
8 |
40320 |
|
-5 |
Invalid |
|
20 |
2432902008176640000 |
Tutorial 7C:
Pattern Generation
Write a C program to generate the
following pattern.
9
88
777
55555
444444
3333333
22222222
111111111
0000000000
111111111
22222222
3333333
444444
55555
6666
777
88
9
#include<stdio.h>
void main()
{
int i;
int pattern_generator(int var1,int
var2);
for(i=9;i>=0;i--)
{
pattern_generator(i,i);
printf("\n");
}
for(i=1;i<=9;i++)
{
pattern_generator(i,i);
printf("\n");
}
}
int pattern_generator(int var1,int var2)
{
if(var1>9)
return 0;
else
{
pattern_generator(var1+1,var2);
printf("%d",var2);
}
return
0;
}
Assign 7C:
Write a C program using recursive
functions to print the following pattern. The function once called should print
a single line of the given pattern. (Maintain a macro named SIZE so the pattern
can be scaled up or down in size).
*
***
*****
*******
*********
*******
*****
***
*
Assign. 7D: Banking
System
Write a C program
using functions to implement the following banking system.
1. The program should take input details of at least two
consumers (like Name, password, account number, initial balance.)
2. Any consumer should be able to make the following transactions:
Deposit, Withdraw, Balance enquiry, Money transfer, provided the password is
correct. Each of these operations
should be implemented as a separate function.
3. All sorts of error checking like insufficient balance,
wrong password, and wrong account number must be notified.
4. The whole setup can be presented to the user in the
form of a menu. The user should able to choose from the set of options what he
needs to do.
5. The program should loop unless user wants to exit.
Hint: the functions can be of the form:
new_account();
balance_enquiry(argument
account_number);
deposit(argument account_number);
withdraw(argument account_number);
money_transfer(argument
source_account_number destination account_number);