uva488 Triangle Wave

Triangle Wave

In this problem you are to generate a triangular wave form according to a specified pair of Amplitude and Frequency.

Input and Output

The input begins with a single positive integer on a line by itself indicating the number of the cases following, each of them as described below. This line is followed by a blank line, and there is also a blank
line between two consecutive inputs.
Each input set will contain two integers, each on a separate line. The first integer is the Amplitude; the second integer is the Frequency.
For each test case, the output must follow the description below. The outputs of two 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 wave equals 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 that line.
NOTE: There is a blank line after each separate waveform, excluding the last one.



输入输出格式易错

#include <stdio.h>

int main()
{
int a, c, d, i, j, k;
scanf("%d", &a);
while (a--)
{
scanf("%d%d", &c, &d);
for (i = 0; i < d; i++)
{
for (k = 1; k <= c; k++)
{
for (j = 0; j < k; j++)
printf("%d", k);
printf("\n");
}
for (k = c-1; k >= 1; k--)
{
for (j = 0; j < k; j++)
printf("%d", k);
printf("\n");
}
if (a != 0 || i != d - 1)
printf("\n");
}
}
return 0;
}