Compilare: user.c: In function ‘main’: user.c:42:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d ", &nrlin, &nrcol); ^ user.c:19:16: warning: ‘d’ may be used uninitialized in this function [-Wmaybe-uninitialized] m[lin][col]=1; ^ user.c:37:53: note: ‘d’ was declared here int nrlin, nrcol, min, lin, col, i, j, a, b, c, d; ^ user.c:19:6: warning: ‘c’ may be used uninitialized in this function [-Wmaybe-uninitialized] m[lin][col]=1; ^ user.c:37:50: note: ‘c’ was declared here int nrlin, nrcol, min, lin, col, i, j, a, b, c, d; ^ user.c:19:16: warning: ‘b’ may be used uninitialized in this function [-Wmaybe-uninitialized] m[lin][col]=1; ^ user.c:37:47: note: ‘b’ was declared here int nrlin, nrcol, min, lin, col, i, j, a, b, c, d; ^ user.c:19:6: warning: ‘a’ may be used uninitialized in this function [-Wmaybe-uninitialized] m[lin][col]=1; ^ user.c:37:44: note: ‘a’ was declared here int nrlin, nrcol, min, lin, col, i, j, a, b, c, d; ^