488 - Triangle Wave

The input begins with a single positive integer on a line by itself indicatingthe number of the cases following, each of them as described below. This line isfollowed by a blank line, and there is also a blank line between two consecutiveinputs.

Each input set will contain two integers, each on a separate line. The first integer is the Amplitude; thesecond integer is the Frequency.

For each test case, the output must follow the description below. The outputs oftwo consecutive cases will be separated by a blank line.

For the output of your program, you will be printing wave forms each separated by a blank line.The total number of wave forms equals the Frequency, and the horizontal ``height'' of each waveequals the Amplitude. The Amplitude will never be greater than nine.

The waveform itself should be filled with integers on each line which indicate the ``height'' of thatline.

NOTE: There is a blank line after each separate waveform, excluding the last one.

Input

1

3
2

Output

1
22
333
22
1

1
22
333
22
1

#include<stdio.h>
#include<string.h>

int main()
{
  int casenum;
  int i,j,k,num;
  int ampli,freq;
  scanf("%d",&casenum);

//！！～～千万注意～～！！：题目中说明了The input begins with a single positive integer on a line by itself  indicating the number of the cases following. This line is followed by a blank line, and there is also a blank line between two consecutive inputs.
  //但是若是这里加上了printf("\n");就会出现WA错误，这是致命的，因为很难查找错误原因。凡是在输入中的空行或是什么的格式要求，千万不要用printf这样的输出语句来规范，因为scanf本身就可以完成这种实现。
  for(i=0;i<casenum;i++)
  {
    scanf("%d",&ampli);
    scanf("%d",&freq);
    for(j=0;j<freq;j++)
    {
      for(k=1;k<=ampli;k++)
      {
    num=k;
    while(num)
    {
      printf("%d",k);
      num--;
    }
    printf("\n");
      }
      for(k=ampli-1;k>=1;k--)
      {
    num=k;
    while(num)
    {
      printf("%d",k);
      num--;
    }
    printf("\n");
      }
      if((j!=freq-1))
    printf("\n");
    }
    if(i!=casenum-1)
      printf("\n");
  }
  return 0;
}