week-6x
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The document contains code for three C programs that use functions: 1) A program to delete n characters from a given position in a string using a delchar function. 2) A program to check if a string is a palindrome using an IsPalindrome function. 3) A program to insert a substring into a main string at a given position using functions.
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![/* Write a C program that uses functions to perform the following operations:
To delete n Characters from a given position in a given string.
*/
#include <stdio.h>
#include <conio.h>
#include <string.h>
void delchar(char *x,int a, int b);
void main()
{
char string[10];
int n,pos,p;
clrscr();
puts("Enter the string");
gets(string);
printf("Enter the position from where to delete");
scanf("%d",&pos);
printf("Enter the number of characters to be deleted");
scanf("%d",&n);
delchar(string, n,pos);
getch();](https://image.slidesharecdn.com/6846252/85/week-6x-1-320.jpg)
![}
// Function to delete n characters
void delchar(char *x,int a, int b)
{
if ((a+b-1) <= strlen(x))
{
strcpy(&x[b-1],&x[a+b-1]);
puts(x);
}
}](https://image.slidesharecdn.com/6846252/85/week-6x-2-320.jpg)
![/* Write a C program to determine if the given string is a palindrome or not */
#include<stdio.h>
#include<string.h>
enum Boolean{false,true};
enum Boolean IsPalindrome(char string[])
{
int left,right,len=strlen(string);
enum Boolean matched=true;
if(len==0)
return 0;
left=0;
right=len-1;
/* Compare the first and last letter,second & second last & so on */
while(left<right&&matched)
{
if(string[left]!=string[right])
matched=false;
else](https://image.slidesharecdn.com/6846252/85/week-6x-3-320.jpg)
![{
left++;
right--;
}
}
return matched;
}
int main()
{
char string[40];
clrscr();
printf("****Program to test if the given string is a palindrome****n");
printf("Enter a string:");
scanf("%s",string);
if(IsPalindrome(string))
printf("The given string %s is a palindromen",string);
else
printf("The given string %s is not a palindromen",string);
getch();
return 0;
}](https://image.slidesharecdn.com/6846252/85/week-6x-4-320.jpg)
![/* Write a C program that uses functions to perform the following operations:
To insert a sub-string in to given main string from a given position.
*/
#include <stdio.h>
#include <conio.h>
#include <string.h>
void main()
{
char a[10];
char b[10];
char c[10];
int p=0,r=0,i=0;
int t=0;
int x,g,s,n,o;
clrscr();
puts("Enter First String:");](https://image.slidesharecdn.com/6846252/85/week-6x-5-320.jpg)
![gets(a);
puts("Enter Second String:");
gets(b);
printf("Enter the position where the item has to be inserted: ");
scanf("%d",&p);
r = strlen(a);
n = strlen(b);
i=0;
// Copying the input string into another array
while(i <= r)
{
c[i]=a[i];
i++;
}
s = n+r;
o = p+n;
// Adding the sub-string
for(i=p;i<s;i++)
{
x = c[i];
if(t<n)
{](https://image.slidesharecdn.com/6846252/85/week-6x-6-320.jpg)
![a[i] = b[t];
t=t+1;
}
a[o]=x;
o=o+1;
}
printf("%s", a);
getch();
}](https://image.slidesharecdn.com/6846252/85/week-6x-7-320.jpg)
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