C program-6

1. /* Write a C program to read a string and check whether it is *
* a palindrome or not (without using library functions). Output *
* the given string along with suitable message */

#include
#include

main()
{
char string[25], revString[25]={'\0'};
int i,length = 0, flag = 0;

clrscr();
fflush(stdin);

printf("Enter a string\n");
gets(string);

for (i=0; string[i] != '\0'; i++) /*keep going through each */
{ /*character of the string */
length++; /*till its end */
}
for (i=length-1; i >= 0 ; i--)
{
revString[length-i-1] = string[i];
}
/*Compare the input string and its reverse. If both are equal
then the input string is palindrome. Otherwise it is
not a palindrome */

for (i=0; i < length ; i++) { if (revString[i] == string[i]) flag = 1; else flag = 0; } if (flag == 1) printf ("%s is a palindrome\n", string); else printf("%s is not a palindrome\n", string); } /*End of main()*/ /*---------------------------------------------------- Output RUN 1 Enter a string madam madam is a palindrome RUN 2 Enter a string Madam Madam is not a palindrome RUN 3 Enter a string good good is not a palindrome ----------------------------------------------------------*/ ********************************************************************************* 2. /* Write a C program to read two strings and concatenate them * * (without using library functions). Output the concatenated * * string along with the given string */ #include
#include
main()
{
char string1[20], string2[20];
int i,j,pos;

strset(string1, '\0'); /*set all occurrences in two strings to NULL*/
strset(string2,'\0');

printf("Enter the first string :");
gets(string1);
fflush(stdin);
printf("Enter the second string:");
gets(string2);

printf("First string = %s\n", string1);
printf("Second string = %s\n", string2);

/*To concate the second stribg to the end of the string
travserse the first to its end and attach the second string*/
for (i=0; string1[i] != '\0'; i++)
{
; /*null statement: simply trvsering the string1*/
}

pos = i;
for (i=pos,j=0; string2[j]!='\0'; i++)
{
string1[i] = string2[j++];
}
string1[i]='\0'; /*set the last character of string1 to NULL*/

printf("Concatenated string = %s\n", string1);
}
/*---------------------------------------
Output
Enter the first string :CD-
Enter the second string:ROM
First string = CD-
Second string = ROM
Concatenated string = CD-ROM
----------------------------------------*/

*********************************************************************

3. /* Write a C program to read an English sentence and replace*
* lowercase characters by uppercase and vice-versa. Output *
* the given sentence as well as the case covrted sentence on*
* two different lines. */

#include
#include
#include

main()
{
char sentence[100];
int count, ch, i;
clrscr();
printf("Enter a sentence\n");
for(i=0; (sentence[i] = getchar())!='\n'; i++)
{
;
}
sentence[i]='\0';
count = i; /*shows the number of chars accepted in a sentence*/

printf("The given sentence is : %s",sentence);
printf("\nCase changed sentence is: ");
for(i=0; i < count; i++) { ch = islower(sentence[i]) ? toupper(sentence[i]) : tolower(sentence[i]); putchar(ch); } } /*End of main()*/ /*------------------------------ Output Enter a sentence Mera Bharat Mahan The given sentence is : Mera Bhaaat Mahan Case changed sentence is: mERA bHARAT mAHAN ------------------------------------------------*/ ****************************************************************** 4. /* Write a C program read a sentence and count the number of * * number of vowels and consonants in the given sentence. * * Output the results on two lines with suitable headings */ #include
main()
{
char sentence[80];
int i, vowels=0, consonants=0, special = 0;
clrscr();
printf("Enter a sentence\n");
gets(sentence);

for(i=0; sentence[i] != '\0'; i++)
{
if((sentence[i] == 'a'||sentence[i] == 'e'||sentence[i] == 'i'||
sentence[i] == 'o'||sentence[i] == 'u') ||(sentence[i] == 'A'||
sentence[i] == 'E'||sentence[i] == 'I'|| sentence[i] == 'O'||
sentence[i] == 'U'))
{
vowels = vowels + 1;
}
else
{
consonants = consonants + 1;
}
if (sentence[i] =='\t' ||sentence[i] =='\0' || sentence[i] ==' ')
{
special = special + 1;
}
}
consonants = consonants - special;
printf("No. of vowels in %s = %d\n", sentence, vowels);
printf("No. of consonants in %s = %d\n", sentence, consonants);
}
/*------------------------
Output
Enter a sentence
Good Morning
No. of vowels in Good Morning = 4
No. of consonants in Good Morning = 7
-----------------------------------------*/



***************************************************************************

5. /* Write a C program to read N names, store them in the form *
* of an array and sort them in alphabetical order. Output the*
* give names and the sorted names in two columns side by side*
* wih suitable heading */

#include
#include

main()
{
char name[10][8], Tname[10][8], temp[8];
int i, j, N;

clrscr();

printf("Enter the value of N\n");
scanf("%d", &N);

printf("Enter %d names\n", N);
for(i=0; i< N ; i++) { scanf("%s",name[i]); strcpy (Tname[i], name[i]); } for(i=0; i < N-1 ; i++) { for(j=i+1; j< N; j++) { if(strcmpi(name[i],name[j]) > 0)
{
strcpy(temp,name[i]);
strcpy(name[i],name[j]);
strcpy(name[j],temp);
}
}
}
printf("\n----------------------------------------\n");
printf("Input Names\tSorted names\n");
printf("----------------------------------------\n");
for(i=0; i< N ; i++)
{
printf("%s\t\t%s\n",Tname[i], name[i]);
}
printf("----------------------------------------\n");
} /* End of main() */
/*--------------------------------
Output
Enter the value of N
3
Enter 3 names
Monica
Laxmi
Anand

----------------------------------------
Input Names Sorted names
----------------------------------------
Monica Anand
Laxmi Laxmi
Anand Monica
----------------------------------------
---------------------------------------- */