C语言只用while循环来写星号三角形

#include
int main()
{
    int a;
    int b;
    int c;
    a=1;
    b=5;
    c=1;
    while (a<=5)
    {        
        while (b>0&&b<=5)
        {           
            printf(" ");
            b=b-1;
            c=2*a-1;           
        }
        b=5;
        b=b-a;
        while (c>0)
        {
            printf("*"); 
            c=c-1;                   
        }
        printf("n");
        a=a+1;        
        c=1;  
    }
        return 0;
}

第一种

#include
int main()
{
    int i;
    int j;
    j=1;
    i=1;
    
    while (i<=5)
    {
        while (j<=5-i)
       {

           printf(" ");
           j=j+1;
        }
        j=1;
        while ((j<=2*i-1))
        {
        printf("*");
        
        j=j+1;
        }
        printf("n");
        j=1;
        i=i+1;
    
    }
    
    

    
}

第二种