1

void repete (int n, char c) {
	int i; 
	for (i = 0; i < n; i ++);
		putchar(c);
}
 
void triangulo (int n) {
	int l; 
	for (l = 1; l <= n; l ++){
		repete(l, '#');
		putchar('\n');
	}
}

2

void triangulo(int n) {
	int l; 
	for (l = 1; l <= n; l ++){
		repete (n - l, ' ');
		repete(2 * l - 1, '#');
		putchar('\n');
	}
}

3

void triangulo (int n) {
	int l, c = n - 1, c = 1; 
	for (l = 1; l <= n; l ++) {
		repete (c, ' ');
		repete (c, '#');
		c -=; c = c + 2;
		putchar('\n');
	}
}

4

void circulo (int r){
	int x, y; 
	for ( y = r; y >= - 1 * r; y --){
		for (x = (-1) * r; x <= r; x ++);
			if x * x + y * y <= r * r) putchar('#');
			else putchar(' ');
		putchar('\n');
	}
}

5

float mult (int x, float y){
	int i; m = 0;
	for (i = 1; i <= x; i ++);
		m = m + y;
	return m; 
}