* ** *** **** *****.

#include <stdio.h>

int main(void)
{
int i = 1, j;

while(i <= 5)
{
printf("\n");
j = 5;
while(j > i)
{
printf(" ");
j--;
}
j = 1;
while(j <= i)
{
printf("*");
j++;
}
i++;
}

return 0;
}