给定源程序：
#include <stdio.h>
#include <stdlib.h>
#define N 5
int fun ( int a[][N], int n )
{
}
main ( )
{ int a[N][N], n, i, j;
printf("***** The array *****\n");
for ( i =0; i<N; i++ )
{ for ( j =0; j<N; j++ )
{ a[i][j] = rand()%10; printf( "%4d", a[i][j] ); }
printf("\n");
}
do n = rand()%10 ; while ( n >=3 );
printf("n = %4d\n",n);
fun ( a, n );
printf ("***** THE RESULT *****\n");
for ( i =0; i<N; i++ )
{ for ( j =0; j<N; j++ ) printf( "%4d", a[i][j] );
printf("\n");
}
NONO( );
}
解题思路：
本题是利用两重循环给二维数组左下三角元素中的值乘以n。
参考答案：
int fun ( int a[][N], int n )
{
int i, j;
for(i = 0 ; i < N ; i++)
for(j = 0 ; j <= i; j++)
a[i][j] *= n ;
}