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Week 8 - Strings
Q1. Write a C program to accept first name, middle name and last name from
user, store them in 3 different character arrays. Concatenate these 3 strings in one
and print as full name.
#include <stdio.h>
#include <string.h>
void main() {
char first[20], middle[20], last[20];
printf("Enter first name: ");
gets(first);
printf("Enter middle name: ");
gets(middle);
printf("Enter last name: ");
gets(last);
strcat(first," ");
strcat(first, middle);
strcat(first," ");
strcat(first, last);
printf("Full Name: %s\n", first);
}
-----------------------------------------------------------------------------
Enter first name: Shyam
Enter middle name: Sudhakar
Enter last name: Yenagandula
Full Name: Shyam Sudhakar Yenagandula
-----------------------------------------------------------------------------
Q2. Write a C Program to get two string inputs from the user. Compare the two
strings using string function and print strings are equal or not.
#include <stdio.h>
#include <string.h>
void main() {
char S1[50], S2[50];
printf("Enter first string (S1): ");
gets(S1);
printf("Enter second string (S2): ");
gets(S2);
int difference = strcmp(S1, S2);
if (difference == 0)
printf("Strings are the same.\n");
else if (difference > 0)
printf("S1 is bigger than S2.\n");
else printf("S2 is bigger than S1.\n");
}
-----------------------------------------------------------------------------
Enter first string (S1): Shyam
Enter second string (S2): Manoj
S1 is bigger than S2.
-----------------------------------------------------------------------------
Q3. Write a C program to accept a string from the user and count the number
of vowels and consonants in it.
#include <stdio.h>
#include <string.h>
void main() {
char string[100];
int vowels = 0, consonants = 0;
printf("Enter a string: ");
gets(string);
for (int i = 0; string[i] != '\0'; i++) {
char ch = string[i];
if ((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')) {
if (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u' ||
ch == 'A' || ch == 'E' || ch == 'I' || ch == 'O' || ch == 'U') {
vowels++;
} else consonants++;
}
}
printf("Vowels: %d\n", vowels);
printf("Consonants: %d\n", consonants);
}
-----------------------------------------------------------------------------
Enter a string: A lazy fox went to sleep
Vowels: 7
Consonants: 12
-----------------------------------------------------------------------------
Week 9 - Pointers and Functions
Q1. (a.) Write a program in C to familiarize with the parameter passing
mechanism into the function: CALL BY VALUE.
#include <stdio.h>
void change(int num) {
printf("Before adding value inside function, num = %d\n", num);
num = num + 100;
printf("After adding value inside function, num = %d\n", num);
}
void main() {
int x = 100;
printf("Before function call, x = %d\n", x);
change(x);
printf("After function call, x = %d\n", x);
}
-----------------------------------------------------------------------------
Before function call, x = 100
Before adding value inside function, num = 100
After adding value inside function, num = 200
After function call, x = 100
-----------------------------------------------------------------------------
Q1. (b.) Write a program in C to familiarize with the parameter passing
mechanism into the function: CALL BY REFERENCE.
#include <stdio.h>
void change(int *num) {
printf("Before adding value inside function, num = %d\n", *num);
*num = *num + 100;
printf("After adding value inside function, num = %d\n", *num);
}
void main() {
int x = 100;
printf("Before function call, x = %d\n", x);
change(&x);
printf("After function call, x = %d\n", x);
}
-----------------------------------------------------------------------------
Before function call, x = 100
Before adding value inside function, num = 100
After adding value inside function, num = 200
After function call, x = 200
-----------------------------------------------------------------------------
Q2. WAP to pass an array to the function and calculate sum and return the sum.
#include <stdio.h>
float calculateSum(float num[], int size) {
float sum = 0.0;
for (int i = 0; i < size; ++i) {
sum += num[i];
}
return sum;
}
void main() {
int n;
printf("Enter the number of elements: ");
scanf("%d", &n);
float num[n];
printf("Enter %d numbers:\n", n);
for (int i = 0; i < n; ++i) {
scanf("%f", &num[i]);
}
float result = calculateSum(num, n);
printf("Sum of the array elements = %.2f\n", result);
}
-----------------------------------------------------------------------------
Enter the number of elements: 7
Enter 7 numbers:
12 45 78 32 11 3.5 6.9
Sum of the array elements = 188.40
-----------------------------------------------------------------------------
Q3. Write a C program to pass an array and its size to a function and sort it
and print the sorted elements in main function.
#include <stdio.h>
void sort(int a[], int size) {
for (int i = 0; i < size - 1; i++) {
int minIndex = i;
for (int j = i + 1; j < size; j++) {
if (a[j] < a[minIndex]) {
minIndex = j;
}
}
if (minIndex != i) {
int temp = a[i];
a[i] = a[minIndex];
a[minIndex] = temp;
}
}
}
void main() {
int n;
printf("Enter the number of elements: ");
scanf("%d", &n);
int a[n];
printf("Enter %d elements:\n", n);
for (int i = 0; i < n; i++) {
scanf("%d", &a[i]);
}
sort(a, n);
printf("Sorted elements:\n");
for (int i = 0; i < n; i++) {
printf("%d ", a[i]);
}
printf("\n");
}
-----------------------------------------------------------------------------
Enter the number of elements: 9
Enter 9 elements:
45 33 66 -18 64 78 32 11 -99
Sorted elements:
-99 -18 11 32 33 45 64 66 78
-----------------------------------------------------------------------------
Q4. Write a C program to pass a string to a function and check if it's
a palindrome or not, and print the result.
#include <stdio.h>
#include <string.h>
void palindrome(char inputString[100]) {
int leftIndex = 0, rightIndex = strlen(inputString) - 1, flag = 1;
while (leftIndex < rightIndex) {
if (inputString[leftIndex] != inputString[rightIndex]) {
flag = 0;
break;
}
leftIndex++;
rightIndex--;
}
if (flag == 1) {
printf("%s is a Palindrome.\n", inputString);
} else {
printf("%s is not a Palindrome.\n", inputString);
}
}
void main() {
char inputString[100];
printf("Enter a string for palindrome check: ");
scanf("%s", inputString);
palindrome(inputString);
}
-----------------------------------------------------------------------------
Enter a string for palindrome check: naman
naman is a Palindrome.
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