> For the complete documentation index, see [llms.txt](https://ashrithsagar.gitbook.io/psuc-lab/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ashrithsagar.gitbook.io/psuc-lab/lab-7.md).

# Lab-7

## Questions

### Question-1

```c
// Preprocessor directives.
#include <stdio.h>
#include <string.h>

int main() // Start main.
{ // Start.

	// Variable initialisations.
	const int s = 100;

	char string[s];
	int word_count, i;

	// Ask user for input.
	printf("Enter a string: \n");
	scanf("%[^\n]s", string);
	// gets(string);

	i = 1; // Initialize.
	word_count = 1; // The initial word is counted here.
	do
	{
		if ((string[i] == ' ') && (string[i+1] != ' ') && (string[i+1] != '\0'))
		{
			// Every space marks the next word only if the next
			// character is not a space and the string has not ended yet.

			// The check for '\0' is necessary to prevent a trailing space to count as a word.

			// Increment word_count.
			word_count++;
		}
		i++;
	} while (string[i] != '\0');

	// Display output.
	printf("\nThe entered string contains %d words.\n", word_count);

	printf("\nMy name is Ashrith Sagar Yedlapalli.\n");

} // End.
```

### Question-2

```c
// Preprocessor directives.
#include <stdio.h>
#include <string.h>

int main() // Start main.
{ // Start.

	// Variable initialisations.
	const int s = 100;

	char string[s];

	// Ask user for input.
	printf("Enter a string: \n");
	scanf("%[^\n]s", string);
	// gets(string);

	for (int i = 0; string[i] != '\0'; i++)
	{
		if (string[i] >= 'A' && string[i] <= 'Z') // Uppercase.
		{
			string[i] += ('a' - 'A'); // Add the deficit.
		}
		else if (string[i] >= 'a' && string[i] <= 'z') // Lowercase.
		{
			string[i] += ('A' - 'a'); // Subtract the excess.
		}
	}

	// Display output.
	printf("\nModified string: \n");
	puts(string);

	printf("\nMy name is Ashrith Sagar Yedlapalli.\n");

} // End.
```

### Question-3

```c
// Preprocessor directives.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main() // Start main.
{ // Start.

	// Variable initialisations.
	const int s = 100;

	int N;
	char string[s][s], temp[s];

	// Ask user for input.
	printf("Enter the number of strings: \n");
	scanf("%d", &N);

    fflush(stdin);

	printf("Enter the strings: \n");
	for (int i = 0; i < N; i++)
	{
		fgets(string[i], s, stdin);
		fflush(stdin);
		// scanf ("%[^\n]%*c", string[i]);
		// gets(string[i]);
	}

	for (int i = 0; i < N ; i++) // Loop through all the strings, starting from the second string.
	{
		for (int j = i+1; j < N ; j++)
		{
			if(strcmp(string[i],string[j]) > 0)
			{
				// Swap.
     			strcpy(temp,string[i]);
    			strcpy(string[i],string[j]);
				strcpy(string[j],temp);
			}
		}
	}

	// Display output.
	printf("\nAlphabetical order: \n");
	for (int i = 0; i < N; i++)
	{
		// fputs(string[i], stdout);
		puts(string[i]);
	}

	printf("\nMy name is Ashrith Sagar Yedlapalli.\n");

} // End.
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://ashrithsagar.gitbook.io/psuc-lab/lab-7.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.