2D array matrix

zainy (1)
A program that fills the right-to-left diagonal of a square matrix with 0s, yhe lower right triangle with -1s, and the upper left triangle with +1s. The output of the program, assuming a 6*6 matrix, is as follows.

+1 +1 +1 +1 +1 0
+1 +1 +1 +1 0 -1
+1 +1 +1 0 -1 -1
+1 +1 0 -1 -1 -1
+1 0 -1 -1 -1 -1
0 -1 -1 -1 -1 -1

i don't know the solution please help me out of it
Konstantin2 (18)
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int m[6][6];

for (int j = 0; j < 6; j++)
    for (int i = 0; i < 6; i++)
        if (i + j > 5) m[j][i] = -1;
        else if (i + j < 5) m[j][i] = 1;
        else m[j][i] = 0;
zoran404 (172)
Edited Konstantin2's algorithm to work with any matrix of size s
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for (int j = 0; j < s; j++)
    for (int i = 0; i < s; i++)
        if (i + j > s-1) m[j][i] = -1;
        else if (i + j < s-1) m[j][i] = 1;
        else m[j][i] = 0;
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