CS 256 - Principles of Structured Design Summer 2021

Displaying ./code/jun03/square.c

/*
	Prompts the user for a size n ,then outputs an n*n square of stars
	using a nested for loop
*/
#include <stdio.h>

int main()
{
	int i, j, size; //variable declarations for the loops and size

	printf("Size of Square: "); //prompting user for the size
	scanf("%d", &size); //getting the user input and assigning it to size

	/*
		C allows the use of nested loops. In this program, we will be using nested loops to print 
		a size x size square of stars. 

	*/



	for(i = 1; i <= size; i++){
	 /*
	 	this outer loop (the i loop) will handle the printing of the rows,
	    it will run a total of size times, so if size were 5, this 
	    loop will run 5 times.
	*/
		for(j = 1; j <= size; j++){
			/* 
				We need an inner for loop (using j) to handle printing the columns

				For every *one* time the outer for loop runs, this inner for loop will run
				size number of times. So if size is 5, this loop will run 5 times for every 
				one time the outer loop runs, for a total of 25 times overall. 
			*/
			printf("*");	
		}
		printf("\n"); //newline so that after the inner loop gets done, we can go on to the next row.
	}
	return 0;
}