c语言新手 求帮助 谢谢大神

Question

Asterisk printing1
• Write a program that outputs a triangle with a '*' character
• Input the Height repeatedly using the While statement
• Output a '*' character using the For statement

Answer 1

#include <stdio.h>
#include <stdlib.h>

/* print rectangular triangle */
int print_rec_triangle( int iHeight );
/* print equicrural triangle */
int print_equ_triangle( int iHeight );
int print_equ_triangle_r( int iHeight );

int
main( void )
{
        int iHeight = 0;

        do
        {
                printf( "please input the triangle height you want: " );
                scanf( "%d", &iHeight );
                if( iHeight > 0 )
                {
                        printf( "\nrectangular triangle:\n" );
                        print_rec_triangle( iHeight );
                        printf( "\nequicrural triangle:\n" );
                        print_equ_triangle( iHeight );
                        printf( "\nequicrural triangle reverse:\n" );
                        print_equ_triangle_r( iHeight );
                }
                putchar( '\n' );
        }while( iHeight > 0 );

        return 0;
}

static int
print_blank( int iBlank )
{
        int i = 0;
        for( i = 0; i < iBlank; i++ )
        {
                putchar( ' ' );
        }
        return 0;
}


int
print_rec_triangle( int iHeight )
{
        int i = 0;
        int j = 0;
        for( i = 0; i < iHeight; i++ )
        {
                for( j = 0; j <= i; j++ )
                {
                            putchar( '*' );
                }
                putchar( '\n' );
        }

        return 0; 
}

int
print_equ_triangle( int iHeight )
{
        int iBlank = iHeight - 1;
        int i = 0;
        int j = 0;

        for( i = 1; i <= iHeight; i++ )
        {
                print_blank( iBlank ); 
                for( j = 1; j <= 2 * i - 1; j++ )
                {
                        putchar( '*' );
                }
                putchar( '\n' );
                iBlank--;
        }
        return 0;
}

int
print_equ_triangle_r( int iHeight )
{
        int iBlank = 0;
        int i = 0;
        int j = 0;

        for( i = iHeight; i >= 1; i-- )
        {
                print_blank( iBlank ); 
                for( j = 1; j <= 2 * i - 1; j++ )
                {
                        putchar( '*' );
                }
                putchar( '\n' );
                iBlank++;
        }
        return 0;
}