Pyrimid program not working for input over 20 why not?

[RyanAnderson2]

So my program is working essentially but any input over 10 the program, over laps and just gets weird, maybe im doing this wrong but would like some help
int rows, star, spaces;
int number_of_stars = 6;
int number_of_rows = number_of_stars;

for (rows=1; rows <= number_of_rows; rows++) {
for (spaces=1; spaces <= number_of_stars; spaces++) {
printf(" ");
}
for (star=1; star <= rows; star++) {
printf("*");
printf(" ");
}
printf("\n");
number_of_stars = number_of_stars - 1;
}
return 0;
}




Any help would be greatly appreciated

[Disch]

Looks fine up to 39 for me.
Once I get to 40 it starts to wrap because the pyramid exceeds the console width, but that is to be expected.