To run the hello world program and experiment with leaving out parts of the hello world program, to see the error message.

Program:

//Leaving out header file
//#include <stdio.h>
main()
{
printf("Hello, ");
	printf("World");
printf("\n");
}

Explanation:

The program above leaving the header file <stdio.h> statement to see the error. There is a warning in the program and shows the output.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 1

Program:

#include <stdio.h>
//Leaving out main function
//main()
{
printf("Hello, ");
	printf("World");
printf("\n");
}

Explanation:

The program above leaving the main function to see the error. There is an error in program line 4.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 2

Program:

#include <stdio.h>
main()
{
//Leaving out first statement line
//printf("Hello, ");
	printf("World");
printf("\n");
}

Explanation:

The program above leaving the first statement line to see the error. There is no error and print world, then a new line.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 3

Program:

#include <stdio.h>
main()
{
printf("Hello, ");
//Leaving out second statement line
	//printf("World");
printf("\n");
}

Explanation:

The program above leaving the second statement line to see the error. There is no error and print hello, then a new line.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 4

Program:

#include <stdio.h>
main()
{
printf("Hello, ");
	printf("World");
	//Leaving out third statement line
//printf("\n");
}

Explanation:

The program above leaving the third statement line to see the error. There is no error and print hello,world without a new line.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 5

Program:

#include <stdio.h>
//Leaving out curley braces.
main()
//{
printf("Hello, ");
printf("World");
printf("\n");
//}

Explanation:

On leaving the curly braces the program will not compile and produce compilation error.

Sample Output:

C Programming Language, Chapter 1, Problem 1E , additional homework tip 6