big triangle v1.c

/*
    big triangle v1.c

In entered number_of_rows print triangle of *

row spaces  *

 0.    4    1
 1.    3    3
 2.    2    5
 3.    1    7
 4.    0    9

For number of spaces in a row we have to find relation with
row and number_of_rows (number_of_rows - row - 1).

For number of * in a row 2we have to find relation with row (2*row+1).

*/

#include <stdio.h>

int main(void)
{
    int i, row, number_of_rows;

    printf("Triangle of how much number_of_rows = ");
    scanf("%d", &number_of_rows);               // try 40

    printf("\n");

    for (row=0; row<number_of_rows; row++)      // print rows one by one row
    {
        for (i=0; i<number_of_rows-row-1; i++)  // print spaces, number_of_rows-row-1 times
            printf("-");                        // replace "-" with " "

        for (i=0; i<2*row+1; i++)               // print *, 2*row+1 times
            printf("*");

        printf("\n");                           // new row
    }

    return 0;
}