CS256 - Principles of Structured Design Fall 2021

Displaying ./code/cs256su21code/jun03/square.c

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/*
        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;
}
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