UVa 488 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.

Sample Input

1

3
2

Sample Output

1
22
333
22
1

1
22
333
22
1

#include <stdio.h>
#include <math.h>
int main(int argc, const char *argv[])
{
    int set, amplitude, frequency, i, j, k, l, first = 1;
    scanf("%d", &set);
    for (i = 0; i < set; i++) {
        getchar();
        scanf("%d%d", &amplitude, &frequency); 
        for (j = 0; j < frequency; j++) {
            if(!first)
                printf("\n");
            for (k = -amplitude + 1; k < amplitude; k++) {
                for (l = 0; l < amplitude - abs(k); l++) {
                    printf("%d", amplitude - abs(k));
                }
                printf("\n");
            }
            first = 0;
        }
    }
    return 0;
}